Ann24viz
Answered

What is the Pattern to solve these: Help me please.
Give the product of each:
1 (x-2) (x (raise to the second power) + 2x +4)
2. (x+3) (x (raise to the second power) - 3x + 9

Sagot :

SugoiOverloadviz
Remember that:
(a + b)(a² - ab + b²) = a³ + b³
(a - b)(a² + ab + b²) = a³ - b³

WHY? Just multiply it out and you'll see that I'm not lying.

Substituting the given to the formula I just gave:
(x - 2)(x² + 2x + 2²) = x³ + 2³ =  x³ - 8
(x + 3)(x² - 3x + 3²) = x³ + 3³ =  x³ + 27