Question

Efetue:
A) (m + n)2

B) (c + 2d)2

C) (2a + 5)2

D) (3x + 4y)2

Answer 1

Oie, Td Bom?!

A)

$= (m + n) {}^{2}$

$= m {}^{2} + 2mn + n {}^{2}$

B)

$= (c + 2d) {}^{2}$

$= c {}^{2} + 2c \: . \: 2d + (2d) {}^{2}$

$= c {}^{2} + 4cd + 4d {}^{2}$

C)

$= (2a + 5) {}^{2}$

$= (2a) {}^{2} + 2 \: . \: 2a \: . \: 5 + 5 {}^{2}$

$= 4a {}^{2} + 20a + 25$

D)

$= (3x + 4y) {}^{2}$

$= (3x) {}^{2} + 2 \: . \: 3x \: . \: 4y + (4y) {}^{2}$

$= 9x {}^{2} + 24xy + 16y {}^{2}$

Att. Makaveli1996