Answer:
Step-by-step explanation:
1. (2x- 1)(x + 7) = (x - 7)(x + 3)
2x^2 + 14x - x - 7 = x^2 + 3x - 7x - 21 =
2x^2 + 13x - 7 = x^2 - 4x - 21 =
2x^2 + 13x = 7 x^2 - 4x = 21
2. 6x^5 + 15x^2 = 8x^4 - 6x =
3x^2(2x^3 + 5) 2x(4x^3 - 3)
3. 6x^2 + 15x + 9 = 14x^2 - 18x + 4 =
3(2x^2 + 5x + 3) = 2(7x^2 - 9x + 2) =
3(2x + 3)(x + 1) 2(7x - 2)(x - 1)
4. 3x^2 + 2x - 1 = x^2 + 10x + 16 =
(3x - 1)(x + 1) (x +2)(x + 8)
