Resposta :
a) x²-1
b) x²-x-2
c) 7x²-7x
d) 2x²+2x
a(x+1)(x-1)= x²-x+x-1 = x²-1
|b(x+1)(x-2)= x²-2x+x-2 = x²-x-2
|c)7x(x-1)= 7x²-7x
|d)2x(x+1)= 2x²+2x
Prontinho
05/04/22
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a(x+1)(x-1)= x²-x+x-1 = x²-1
|b(x+1)(x-2)= x²-2x+x-2 = x²-x-2
|c)7x(x-1)= 7x²-7x
|d)2x(x+1)= 2x²+2x
05/04/22