Question

Calcule
a) (3 + × )² =
b) (× + 5 )² =
c) ( × + y)² =
d) ( × + 2 )² =

Answer 1

Explicação passo-a-passo:

a) (3+x)×(3+x)=

9+3x+3x+x²=

x²+6x+9

b) (x+5)×(x+5)=

x² +5x+5x+25=

x²+10x+25

c) (x+y)×(x+y)=

x²+xy+xy+y² =

x² +y² +2xy

d) (x+2)×(x+2)=

x² +2x+2x+4

x² +4x+4