Question

Alguém me ajuda pfvr!?​

Answer 1

Resposta:

a) (3+x)×(3+x)

3×3+3x+3x+x×x

9+3x+3x+x²

9+6x+x²

=x²+6x+9

b) (x+5)×(x+5)

x×x+5x+5x+5×5

x²+5x+5x+25

=x²+10x+25

c) (x+y)×(x+y)

x×x+xy+xy+y×x

x²+xy+xy+y²

=x²+2xy+y

d) (x+2)×(x+2)

x×x+2x+2x+2×2

x²+2x+2x+4

=x²+4x+4

e) (3x+2)×(3x+2)

3x×3x+3x×2+2×3x+2×2

9x²+6x+6x+4

=9x²+12x+4

f) (2x+1)×(2x+1)

2x×2x+2x+2x+1

4x²+2x+2x+1

=4x²+4x+1

g) (5+3x)×(5+3x)

5×5+5×3x+3x×5+3x×3x

25+15x+15+9x²

25+30x+9x²

=9x²+30x+25

h) (2x+y)×(2x+y)

2x×2x+2xy+2xy+y×x

4x²+2xy+2xy+y²

=4x²+4xy+y²

Espero ter ajudado ;)