Question

ATIVIDADES: 1-Calcule: a- ( m + m )² =
b- ( f + g )²=
c- ( x + 2 )² =
d- ( 3 + x )² =
e- ( r + 4 )² =
f- ( 10 + n )² =
g- ( s + t )² =
h- ( 12 + a )²=
i- ( y + 8 )²=
j- ( 9 + x )²=.

Answer 1

Oie, Td Bom?!

a)

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

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

$= 4m {}^{2}$

b)

$= (f + g) {}^{2}$

$= f {}^{2} + 2fg + g {}^{2}$

c)

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

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

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

d)

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

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

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

e)

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

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

$= r {}^{2} + 8r + 16$

f)

$= (10 + n) {}^{2}$

$= 10 {}^{2} + 2 \: . \: 10n + n {}^{2}$

$= n {}^{2} + 20n + 100$

g)

$= (s + t) {}^{2}$

$= s {}^{2} + 2st + t {}^{2}$

h)

$= (12 + a) {}^{2}$

$= 12 {}^{2} + 2 \: . \: 12a + a {}^{2}$

$= 144 + 24a + a {}^{2}$

i)

$= (y + 8) {}^{2}$

$= y {}^{2} + 2y \: . \: 8 + 8 {}^{2}$

$= y {}^{2} + 16y + 64$

j)

$= (9 + x) {}^{2}$

$= 9 {}^{2} + 2 \: . \: 9x + x {}^{2}$

$= x {}^{2} + 18x + 81$

Att. Makaveli1996