Question

efetue essas multiplicações no caderno.
a) (a+1) × (a+2)
b) (r+5) × (r-3)
c) (x+3)(x+4)
d) (3m-5)(2m-1)
e) (y+2)²
f) (x+6)(x-6)
g) (x-2)(x²-5x+6)
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Answer 1

Explicação passo-a-passo:

a) (a+1) × (a+2)= a²+2a+a+2=a²+3a+1

b) (r+5) × (r-3)=r²-3r+5r-15=r²+2r-15

c) (x+3)(x+4)=x²+4x+3x+12=x²+7x+12

d) (3m-5)(2m-1)=6m²-3m-10m+5=6m²-10m+5

e) (y+2)²=y²+4y+4

f) (x+6)(x-6)=x²-6x+6x-36=x²-36

g) (x-2)(x²-5x+6)=x³-5x²+6x-2x²+10x-12

=x³-2x²+10x-12