Question

factor by grouping. x^3+8x^2-2x-16

Answer 1

group first two term and then next two terms
first two term have x^2 in common
x^2(x+8)
next two term have -2 in common
-2(x+8)
x^2(x+8)-2(x+8)

Answer 2

(x^3+8x^2)-(2x+16)
x^2(x+8)-2(x+8)
(x^2-2)(x+8)
(x-sqrt{2})(x+sqrt{2})(x+8)

Answer 3

both term have (x-8) in common so
(x^2 -2) (x+8)

Answer 4

Hi, usingfactoring by grouping, solve 6x^3-6x^2-x+1