Question

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

Answer 1

A-B, onde A= (x+5)³ e B=(x-5)³
(x+5)³-(x-5)³
[(x+5)(x+5)(x+5)]-[(x-5)(x-5)(x-5)]
[(x²+5x+5x+25)(x+5)]-[(x²-5x-5x+25)(x-5)]
(x³+5x²+5x²+25x+5x²+25x+25x+125)-(x³-5x²-5x²+25x-5x²+25x+25x-125)
x³+5x²+5x²+25x+5x²+25x+25x+125 -x³+5x²+5x²-25x+5x²-25x-25x+125
30x²+250
10(3x²+25)