Question

(5+3x)² ??????? Me ajuda

Answer 1

Resposta:

$5 ^{2} + 2 \times 5 \times 3x + (3x) {}^{2} \\ \\ 25 + 2 \times 5 \times 3x + (3x) { }^{2} \\ \\ 25 + 2 \times 5 \times 3x + {3}^{2} x { }^{2} \\ \\ 25 + 2 \times 5 \times 3x + 9 {x}^{2} \\ \\ 25 + 30x + 9 {x}^{2}$

Resposta : 25 + 30 x +9x2