Question

1). Factor by grouping: x^3 + 2x^2 + 5x + 10
A. (x^3 + 2x^2)(5x + 10)
B. (x^2 + 2)(x + 5)
C. (x^2 + 5)(x + 2)
D. x(x^2 + 2x + 5) + 10

2).
Factor by grouping: xy - 2y + 2x - 4.
A. (x - 2)(y + 2)
B. (x + 4)(y + 2)
C. (x + y)(x - 2)

3). Factor by grouping: x^3 - 2x^2 - 4x + 8.
A. (x^3 - 2x^2)(-4x + 8)
B. (x^2 + 4)(x - 2)
C. x(x^2 - 2x - 4) + 5
D. (x - 2)(x - 2)(x + 2)