SOLUTION: Solve each equation a. x^2+15x=0 b.12x^2+7x-12=0 c.3x^3=27x

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Solve each equation a. x^2+15x=0 b.12x^2+7x-12=0 c.3x^3=27x      Log On


   

Question 1157725: Solve each equation

a. x^2+15x=0
b.12x^2+7x-12=0
c.3x^3=27x
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
--------------------
a. x^2+15x=0
b.12x^2+7x-12=0
c.3x^3=27x
--------------------

a:
Factorize and use Zero Product Principle.


b:
At least try to factorize, but if not factorable, then use general quadratic solution formula.

c:
Try like this:
3x%5E3-27x=0
%281%2F3%29%283x%5E3-27x%29=%281%2F3%290
x%5E3-9x=0 and you should know how to finish from here.