Question

CALCULE

a) (x+5)2

$\frac{2}{?3} - y}2$


​

Answer 1

Resposta:

$(x+5)^2\\\\\mathrm{Aplique\:a\:formula\:do\:quadrado\:perfeito}:\quad \left(a+b\right)^2=a^2+2ab+b^2\\\\=x^2+2x\cdot \:5+5^2\\\\=x^2+10x+25\\\\\\\\(\frac{2}{3}-y)^2\\\\=\left(\frac{2-y\cdot \:3}{3}\right)^2\\\\\mathrm{Aplicar\:as\:propriedades\:dos\:expoentes}:\quad \left(\frac{a}{b}\right)^c=\frac{a^c}{b^c}\\\\=\frac{\left(2-3y\right)^2}{3^2}\\\\=\frac{\left(2-3y\right)^2}{9}$