SOLUTION: solve for x using the factoring method: -3x^2-x-7

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: solve for x using the factoring method: -3x^2-x-7      Log On


   

Question 228523: solve for x using the factoring method: -3x^2-x-7
Found 3 solutions by jim_thompson5910, stanbon, Princess13444:
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
3x%5E2-18=-3x Start with the given equation.


3x%5E2%2B3x-18=0 Add 3x to both sides.


3%28x%2B3%29%28x-2%29=0 Factor the left side

Now set each factor equal to zero:
x%2B3=0 or x-2=0

x=-3 or x=2 Now solve for x in each case


So our answers are

x=-3 or x=2

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
solve for x using the factoring method: 3x^2-18=-3x
----------------------------------------
3x^2+3x-18 = 0
3(x^2+x-6) = 0
3(x+3)(x-2) = 0
x = -3 or x = 2
=======================
Cheers,
Stan H.

Answer by Princess13444(1) About Me  (Show Source):