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=
por favor eu preciso de ajuda

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

Answer 2

Explicação passo-a-passo:

a)

(m + m)²

= (m + m).(m + m)

= m² + m² + m² + m²

= 2m² + 2m²

= 4m²

b)

(f + g)²

= (f + g).(f + g)

= f² + fg + fg + g²

= f² + 2fg + g²

c)

(x + 2)²

= (x + 2).(x + 2)

= x² + 2x + 2x + 4

= x² + 4x + 4

d)

(3 + x)²

= (3 + x).(3 + x)

= 9 + 3x + 3x + x²

= 9 + 6x + x²

e)

(r + 4)²

= (r + 4).(r + 4)

= r² + 4r + 4r + 16

= r² + 8r + 16

f)

(10 + n)²

= (10 + n).(10 + n)

= 100 + 10n + 10n + n²

= 100 + 20n + n²

g)

(s + t)²

= (s + t).(s + t)

= s² + st + st + t²

= s² + 2st + t²

h)

(12 + a)²

= (12 + a).(12 + a)

= 144 + 12a + 12a + a²

= 144 + 24a + a²

i)

(y + 8)²

= (y + 8).(y + 8)

= y² + 8y + 8y + 64

= y² + 16y + 64

j)

(9 + x)²

= (9 + x).(9 + x)

= 81 + 9x + 9x + x²

= 81 + 18x + x²