SOLUTION: Solve the equation x2 + 3x - 9 = 0. multiply and simplify (3x+5) (x-3) 3x(2x2 + 5x - 4) = Factor the expression 6x2 - 27x - 15 completely.

Algebra ->  Inequalities -> SOLUTION: Solve the equation x2 + 3x - 9 = 0. multiply and simplify (3x+5) (x-3) 3x(2x2 + 5x - 4) = Factor the expression 6x2 - 27x - 15 completely.       Log On


   

Question 147916: Solve the equation x2 + 3x - 9 = 0.
multiply and simplify (3x+5) (x-3)
3x(2x2 + 5x - 4) =
Factor the expression 6x2 - 27x - 15 completely.
Answer by oscargut(2103) About Me  (Show Source):
You can put this solution on YOUR website!
x^2 + 3x - 9 = 0 then x+=+%28-3+%2B-+sqrt%28+3%5E2-4%2A1%2A%28-9%29+%29%29%2F%282%2A1%29+=
x+=+%28-3+%2B-+sqrt%28+45+%29%29%2F2+
(3x+5)(x-3)=3x^2+5x-9x-15 = 3x^2-4x-15
3x(2x2 + 5x - 4) = 6x^3+15x^2-12x
6x^2 - 27x - 15=0 then x+=+%2827+%2B-+sqrt%28+%28-27%29%5E2-4%2A6%2A%28-15%29+%29%29%2F%282%2A6%29+=
x+=+%2827+%2B-+sqrt%28+1089+%29%29%2F12+=x+=+%2827+%2B-+%2833%29%29%2F12+
then x=5 or x=-1/2

then 6x^2 - 27x - 15= 6(x-5)(x+1/2)