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New Member
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Nov 11, 2011, 02:55 PM
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Transposing Formula
^ means power of
2nd question - numbers should be subscripted
π means pi
v^2 = u^2 2as for v
p1 A1 v1 = p2 A2 v2 for A1
v = πr^2h for r
x-a x-b =1 for x
b c
Please provide working out as well as answers so I can learn,thanks
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New Member
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Nov 11, 2011, 02:59 PM
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sorry the c in the third queston should be below x-b
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New Member
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Nov 11, 2011, 03:01 PM
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Also an addition sign should be between x-a and a-b, and also before 2as in the first question
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Uber Member
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Nov 12, 2011, 11:47 AM
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for v
Take the square root on both sides.
for A1
Divide both sides by
for r
First divide both sides by , then take the square root on both sides.
for x
1. Multiply both sides by the least common multiple of the fractions.
2. Expand and simplify the brackets which will be formed.
3. Add/Subtract anything on both sides so that terms in x only remain on the left.
4. Factor out x.
5. Divide by the coefficient of x.
Can you post what you get? :)
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New Member
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Nov 12, 2011, 01:41 PM
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My first answer is 1st step √v^2 = √u^2 + 2as
2nd step V = u^2 + √2as
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New Member
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Nov 12, 2011, 01:47 PM
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Here is my first answer to the 1st question 1st step (square rt v^2) = (square rt u^2) + 2as The brackets make it easier to show what I am square rooting 2nd step V = u^2 + (square rt 2as)
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New Member
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Nov 12, 2011, 01:59 PM
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2nd question answer 1st step p1A1v1 = p2A2v2
p1v1 p1v1
2nd step A1 = p2A2v2
p1v1
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New Member
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Nov 12, 2011, 02:01 PM
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The p1v1 p1v1 and p1v1 should be directly below the lines sorry!
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New Member
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Nov 12, 2011, 02:33 PM
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3rd question 1st v = πr^2h
πh πh
2nd v = r^2
πh
3rd (square rt v) = r^2
πh
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New Member
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Nov 12, 2011, 02:35 PM
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Ï€ means pi
I couldn't work out the last one, couuld you please verify my answers and show me how to get the last question, thanks josh.
Ï€h
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New Member
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Nov 12, 2011, 02:37 PM
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* π means pi
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Uber Member
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Nov 13, 2011, 03:47 AM
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Originally Posted by Josh2345
My first answer is 1st step ˆšv^2 = ˆšu^2 + 2as
2nd step V = u^2 + ˆš2as
You mean this?
No, that's wrong. It should be this:
When you do something on one side, the same thing must happen on the whole other side.
2. Good
3. Same thing here. It should be:
4.
First multiply by the least common multiple of the denominators.
The L.C.M is because, hence:
Can you expand here?
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New Member
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Nov 13, 2011, 03:59 AM
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Thanks unknown, I will learn from this.
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New Member
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Nov 13, 2011, 04:10 AM
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I have expanded the last! A = -1b + bc-1x + -1b2c-1 + x
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Uber Member
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Nov 13, 2011, 04:53 AM
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Um.. I'm not sure where you got that...
Here is what you get when you expand.
Now, bringing all the x and terms not in x on different sides:
Can you factor x here on the left and then divide both sides by (c + b)?
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New Member
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Nov 13, 2011, 05:15 AM
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Will I need to rearrange the equation in the form "(quadratic) = 0"?
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New Member
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Nov 13, 2011, 05:18 AM
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is the answer to the first step x^2=cb+bc+ca+b^2
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Uber Member
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Nov 13, 2011, 05:38 AM
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No no no. How do you factorise cx + bx?
Just like that:
2x + 3x = x(2 + 3)
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New Member
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Nov 13, 2011, 05:48 AM
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Ok x(C+B) Now do I divide both sides by (c+b)?
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New Member
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Nov 13, 2011, 06:11 AM
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So the final answer is x=bc+ca+b^2
(c+b)
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