Question

sejam os polinomios p= x³ - 2x² + x, q=2x-1 e r= x + 1. efetuando p+q-r obtemos

Answer 1

p+q-r

$({x}^{3} - {2x}^{2} + x )+( 2x - 1) - (x + 1) \\ \\ {x}^{3} - {2x}^{2} + x + 2x - 1 - x - 1 = \\ \\ {x}^{3} - {2x}^{2} + 2x - 2$