Hey could I have some help with these:
(b) 6 3 0 2
x − x + = by completing the square (giving an exact answer simplified if
possible). (3 marks)
(c) 2 7 3 2
x − x = by the formula (giving exact answers).
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Hey could I have some help with these:
(b) 6 3 0 2
x − x + = by completing the square (giving an exact answer simplified if
possible). (3 marks)
(c) 2 7 3 2
x − x = by the formula (giving exact answers).
For an equation, the completed square form is:
To do that, first of all remove (by factorisation) the coefficient of x^2:
Then, divide the coefficient of x by 2, replace x^2 by x and x by 1. Put all into brackets and square them. Also, subtract the square of the coefficient of x you just divided by 2:
Then, re expand your values:
Care to try the part (b) that you asked?
I (or another member) will tell you whether this is good.
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