Question

Describe the following algebraic forms ! a.(2x-1) (3x+4) b.(3x-2)³

Answer 1

question a
(2x-1)(3x+4)
= 2x.3x + 2x.4 - 1.3x - 1.4
= 6x² + 8x - 3x - 4
= 6x² + 5x -4

question b
(3x-2)³ = (3x-2)(3x-2)²
= (3x-2)((3x-2)(3x-2))
= (3x-2)(9x²-6x-6x+4)
= (3x-2)(9x²-12x+4)
= 3x.9x² - 3x.12x - 2.9x² + 24x - 8
= 27x³ - 36x² - 18x² + 24x - 8
= 27x³ - 54x² + 24x - 8