Question

2) Relacione as colunas:

a) x2 + 6x + 9 ( ) (x + 3) 2

b) x2 + 10x + 25 ( ) (x + 2)²

c) x2 + 4x + 4 ( ) (x+4) 2

d) x2 + 8x + 16 ( ) (x + 5) 2

Answer 1

(x + 3)² = x² + 2 . x . 3 + 3² = x² + 6x + 9 (a)

(x + 2)² = x² + 2 . x . 2 + 2² = x² + 4x + 4 (c)

(x + 4)² = x² + 2 . x . 4 + 4² = x² + 8x + 16 (d)

(x + 5)² = x² + 2 . x . 5 + 5² = x² + 10x + 25 (b)