Question

9) Aplicando o quadrado da soma de dois termos, resolva: a ) ( a + b )² = b) ( x + Y ) ² = c) ( x + 3 ) ² = d) ( x + 4 ) ² =​

Answer 1

a)

$= (a + b) {}^{2}$

$\boxed{ = a {}^{2} + 2ab + b {}^{2} }$

b)

$= (x + y) {}^{2}$

$\boxed{ = x {}^{2} + 2xy + y {}^{2} }$

c)

$= (x + 3) {}^{2}$

$= x {}^{2} + 2x \: . \: 3 + 3 {}^{2}$

$\boxed{ = x {}^{2} + 6x + 9}$

d)

$= (x + 4) {}^{2}$

$= x {}^{2} + 2x \: . \: 4 + 4 {}^{2}$

$\boxed{ = x {}^{2} + 8x + 16}$

Att. NLE Top Shotta