Question

desenvolva os seguintes produtos notaveis:
a) (x-5)²
b) (x+2/3)²

Answer 1

(X-5)² = (X-5)(X-5) .. X² + 2(X-5) + 5² = X²- 10X +25

(x+2/3)² =  (x- 2/3)2 = x² - 2.x.(2/3)+(2/3)²  = x² - (4/3)x+(4/9) 

Answer 2

a) (x-5)²

(x - 5)(x - 5)

x² - 5x - 5x + 25

x² - 10x + 25

b) (x+2/3)²

(x + 2/3)(x + 2/3)

x² + 2x/3 + 2x/3 + 4/9

x² + 4x/3 + 4/9