Question

ESPM SP o valor da expressão x³-x/x³+3x²+2x

Answer 1

x³-x/x³+3x²+2x = x(x²-1)/x(x²+3x+2) = x²-1/x²+3x+2 


x²-1 = (x+1)(x-1)
x²+3x+2 = (x+2)(x+1)

x³-x/x³+3x²+2x = x²-1/x²+3x+2 = (x+1)(x-1)/(x+2)(x+1) = (x-1)/(x+2)