Question

2)Calcule o quadrado da soma de dois termos:

a) ( a + b )²

b) (3x +y)²


​

Answer 1

Oie, Td Bom?!

a)

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

b)

$= (3x + y) {}^{2} \\ = (3x) {}^{2} + 2 \: . \: 3xy + y {}^{2} \\ = 9x {}^{2} + 6xy + y {}^{2}$

Att. Makaveli1996