Question

упростите выражение а+а^2-а^3-1/а^2-1​

Answer 1

Пошаговое объяснение:

$\frac{a + a {}^{2} - a {}^{3} - 1}{a {}^{2} - 1} =\frac{\left(a-1\right)\left(a+1\right)\left(-a+1\right)}{\left(a-1\right)\left(a+1\right)} =\frac{-\left(a-1\right)\left(a-1\right)\left(a+1\right)}{\left(a-1\right)\left(a+1\right)} =-\left(a-1\right) =-a+1$