Question

Factor completely 16x^2 - 25.

(4x - 5)(4x - 5)

(4x + 5)(4x - 5)

(16x + 5)(x - 5)

(16x - 5)(x + 5)



Select the factors of xy - 4x + 2y - 8.

(x - 2)(y + 4)

(x + 2)(y - 4)

(x - 4)(y + 2)

(x + 4)(y - 2)



Factor completely 3x^3 - 3x^2 - 18x.

3x(x + 3)(x + 2)

3x(x + 3)(x - 2)

3x(x - 3)(x + 2)

3x(x - 3)(x - 2)

Answer 1

for first apply a^2-b^2 formula

Answer 2

1.(4x + 5)(4x - 5)
2.(x + 2)(y - 4)
3.3x(x - 3)(x + 2)

Answer 3

thanks c: