B. Factor the polynomials completely. Choose the correct factors inside the box below.

1. 25xys - 30x²y3 - 20xy2

2. 4x2y4 – 36x4y2

3. 36 - 25x6

4. x3 + 125

5. 20 + 5x + 6x2 +24x




(6 - 5x³) (6 + 5x3)

(x + 5) (x2 – 5x + 25)

5xy? (5y3 - 6xy - 4x²)

4x?y? (y - 3x)(y + 3x)