Question

Calcule o valor de A-B, dados A=(x+5)³ e B=(x-5)³.

Answer 1

Olá,Tudo Bom?

a) (x+5)³=

x³+3.x².5+3.x.5²+5³=

x³+15x²+75x+125

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b) (x-5)³=

x³-3.x².5+3.x.5²-5³=

x³-15x²+75x-125

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Subtraindo os termos,temos:

x³+15x²+75x+125-x³-15x²+75x-125

30x²+250

Att=Gauzz