Answer:
Step-by-step explanation:
a² - b² = (a + b)(a - b)
x² - 16 = x² - 4²
= (x + 4)(x -4)
8 - 2x = (-2)*(-4) - 2x
= -2( -4 + x)
= -2( x - 4)
6(x² - 16) - (3x +1)(x - 4) + (8 - 2x) = 6(x +4)(x-4) -(3x +1)(x -4) - 2(x -4)
= (x -4) [6*(x+4) - (3x+ 1) - 2]
= (x -4) [ 6x + 24 - 3x - 1 - 2]
= (x - 4) [ 6x - 3x + 24 - 1 - 2]
= (x - 4)(3x + 21)
= (x -4) 3*(x +7)
= 3(x -4)(x+7)
