Question

Efetue: (10 – x)² *
25 pontos
(A) 100 + 20x+x²
(B) 100 – 20x – x²
(C) 100 + 20x+x
(D) 100 – 20x+x²

Answer 1

Oie, Td Bom?!

■ Resposta: Opção D.

$= (10 - x) {}^{2}$

$= 10 {}^{2} - 2 \: . \: 10x + x {}^{2}$

$= 100 - 20x + x {}^{2}$

Att. Makaveli1996