# How do you factor #15x^4-50x^3-40x^2#?

##### 1 Answer

#### Explanation:

Look for the greatest common factors of all the numbers/letters. in this case,

#5x^2 (3x^2 - 10x - 8)#

Since you have a number greater than

#5x^2 ( 3x^2 - 12x + 2x - 8)#

Look for the GCFs in the first two variables inside the brackets and then the second two.

#5x^2 [ ( 3x (x - 4) + 2 (x - 4) ]#

Collect like terms and simplify

#5x^2 (3x + 2)(x - 4)#