4x3 + 12x2 = 40x

How to solve by factoring

Answer:0.9

Step-by-step explanation:

4x3+12x2=40X

12+24=40x

36=40x

x=36 ➗ 40

x=0.9

x=0 x=-5 x=2

Step-by-step explanation:

4x3 + 12x2 = 40x

Subtract 40x from each side

4x3 + 12x2 - 40x=0

Factor out 4x from each term

4x (x^2 + 3x-10) = 0

Factor the term insdie the parentheses

What 2 numbers multiply to - 10 and add to 3

5*-2 = -10

5+-2 = 3

We have (x+5) (x-2)

Replace that in the equation

4x (x+5) (x-2) = 0

Using the zero product property

4x = 0 x+5 = 0 x-2 = 0

x=0 x=-5 x=2