Question

1.encontre o resultado de cada letra abaixo.

a) (3X-4)²
b) (3X+2)²
c) (8X+3) • (8X-3)​

Answer 1

Respostas: A) 9x² - 24x + 16. B) 9x² + 12x + 4. C) 64x² - 9.

Todos os cálculos completos:

A) $(3x - 4) {}^{2} \\ (3x) {}^{2} - 2 \times 3x \times 4 + 4 {}^{2} \\ 9x {}^{2} - 2 \times 3x \times 4 + 4 {}^{2} \\ 9x {}^{2} - 24x + 4 {}^{2} \\ 9x {}^{2} - 24x + 16$

B) $(3x + 2) {}^{2} \\ (3x) {}^{2} + 2 \times 3x \times 2 + 2 {}^{2} \\ 9x {}^{2} + 2 \times 3x \times 2 + 2 {}^{2} \\ 9x {}^{2} + 12x + 2 {}^{2} \\ 9x {}^{2} + 12x + 4$

C) $(8x + 3) \times (8x - 3) \\ (8x) {}^{2} - 3 {}^{2} \\ 64x {}^{2} - 3 {}^{2} \\ 64x {}^{2} - 9$

$\boxed{\huge\rightarrowtail\boldsymbol{ Queen}}$