Question

(
$(3x + 1) { }^{2}$
​

Answer 1

Resposta:

9x²+6x+1

Explicação passo-a-passo:

$(3x + 1) {}^{2} \\ (3x) {}^{2} + 2 \times 3x \times 1 + 1 {}^{2} \\ (3x) {}^{2} = 3 {}^{2} \times 2 = 9x {}^{2} \\ 9x {}^{2} + 2 \times 3x \times 1 + 1 {}^{2} \\ 2 \times 3x \times 1 = 2 \times 3x = 6x \\ 9x {}^{2} + 6x + 1 {}^{2} \\ 1 {}^{2} = 1 \\ 9x {}^{2} + 6x + 1$