Question

quanto que dar AJUDA

(3x + y)²
(3a + 2)²
(4a + y³)²
(3/4x + 2/5y)²

Answer 1

Olá, boa noite ☺

Resoluções:

a)

(3x + y)²
3.3.x.x+2.3.x.y+y.y
9x²+6xy+y²

b)

(3a + 2)²
3.3.a.a+2.3.2.a+2.2
9a²+12a+4

c)

(4a + y³)²
4.4.a.a + 2.4.a.y³+y³.y³
16a²+8ay³+y⁶

d)

  $( \dfrac{3}{4}x+ \dfrac{2}{5}y)^2 \\ \\ \dfrac{3^2}{4^2} x^2 +2\cdot \dfrac{3}{4} x\cdot \dfrac{2}{5} y+ \dfrac{2^2}{5^2}y^2 \\ \\ \dfrac{9}{16} x^2+ \dfrac{12}{20} xy+ \dfrac{4}{25} y^2 \\ \\ \dfrac{9}{16} x^2+\dfrac{3}{5} xy+ \dfrac{4}{25} y^2$

Bons estudos :)