Question

ajuda ai pf
1) Calcule:
a) (3x + 2)2 =
b) (-5 + n)2 =
c) (a + ab)2 =
d) (x + 1)2 =
e) ( x/2 +y/2)2 =​

Answer 1

a) (3x + 2)² =

(3x+2).(3x+2)=

(3x)²+2.(2).(3x)+(2)²=

=9x²+12x+4

b) (-5 + n)²=(-5+n).(-5+n)

(-5)²+2.(-5).(n)+(n)²=

(25)-10n+n²= n²-10n+25

c) (a + ab)² =

(a+ab).(a+ab)=

(a)²+2.(ab).(a)+(ab)²=a²2a²b+a²b²

d) (x + 1)² =

(x+1).(x+1)= (x)²+2.(x).(1)+(1.1)

(x+1).(x+1)=x²+2x+1

e) ( x/2 +y/2)² =

(x/2)2+2.(x/2).(y/2)+(y/2)²=

(x²/4)+2xy/4+y²/4=x²+2xy+y²/4

Espero ter ajudado!