Answer:
B.) 2(5x-4)(x+1)
Step-by-step explanation:
10x^2+2x-8
= 2(5x^2 + x - 4)
= 2(5x^2 + 5x - 4x - 4)
= 2[5x(x + 1) - 4(x + 1)]
= 2(5x-4)(x+1)
Answer:
B.) 2(5x - 4)(x + 1).
Step-by-step explanation:
10x^2+2x-8
First divide by the common factor 2:
= 2(5x^2 + x - 4)
Now we factor the expression in the parentheses using the 'ac' method.
5 * -4 = -20 so to get the + x in the middle we need 5x - 4x:
= 2 ( 5x^2 + 5x - 4x - 4)
= 2[ 5x(x + 1) - 4(x + 1)]
= 2(5x - 4)(x + 1) (answer).
