Question

Expand and simplify(x+3)(4x2-x-8)​

Answer 1

Answer:

4x3+11x2−11x−24

Step-by-step explanation:

(x+3)(4x2−x−8)

=(x+3)(4x2+−x+−8)

=(x)(4x2)+(x)(−x)+(x)(−8)+(3)(4x2)+(3)(−x)+(3)(−8)

=4x3−x2−8x+12x2−3x−24

=4x3+11x2−11x−24

Answer 2

(x+3)(4x2-x-8) = -x(x+3)

Steps:
(x+3)(4x2-x-8)

Multiply the numbers: 4x2=8
= (x+3)(-x+8-8)

Simplify: 8-x-8: -x
= (x+3)(-x)

Remove parentheses: (-a) = -a
= -(x+3)x