View Full Version : Algebra II problem solvers, with work?
MandyMarieLove
Jul 15, 2010, 07:21 PM
Hey, I need help with my Algebra II class. I have found math solver sites, but none give me the steps to do the problem! I don't want to be given the answers and not know what to do! Helppp?
KISS
Jul 15, 2010, 08:09 PM
Not quite the way to learn.
Post away with your thoughts and possible solutions.
MandyMarieLove
Jul 15, 2010, 08:26 PM
Okay, so here's my big thing.. solving quadratic equations by factoring, I know it sounds stupid.. But, I don't understand the factoring process of it. Can you help?
Here's an example:
Identify the solutions to the equation 2x2 + 5x = 3 when you solve by factoring.
ISneezeFunny
Jul 15, 2010, 08:43 PM
solving by factoring:
step 1: move everything to one side of the equation, leaving 0 on the other side.
2x^2 + 5x - 3 = 0
step 2: divide by the number in front of the highest factor (in this case 2), however, it will make this very ugly, so we'll skip that.
step 3: find factors
2x^2 + 5x - 3 = 0
(2x - 1)(x + 3) = 0
step 4: FOIL it out to see if that works
2x^2 + 6x - x - 3 = 0
step 5: solve
(2x - 1)(x + 3) = 0
2x - 1 = 0
x + 3 = 0
2x = 1
x = 1/2
x = -3
KISS
Jul 15, 2010, 08:50 PM
Assuming the 2x2 is 2x^2
Start by making it equal to zero
2x^2+5x-3 = 0
There are only two things that can get you 2x^2 and that's a 2x and an x
The only factors of 3 are 3 and 1; one has to be negative to end up with a -3
try them and arrive at:
(x+3) (2x-1) = 0 is the answer.