Question

Dados os polinomios A = x² + 3x + 2,B = 2x² - 5 e C = x-4, Calcule:

a) A + B
b) B - C
c) A - B + C

Answer 1

$a) A+B\to \\\\ ( x^{2} + 3x + 2)+(2x^2 - 5)\to\\\\ 3 x^{2} +3x-3\\\\\\\\ b)B-C\to \\\\ (2x^2 - 5)-(x-4)\to\\\\ 2 x^{2} -x-1\\\\\\\\ c)A-B+C\to \\\\ ( x^{2} + 3x + 2)-(2x^2 - 5)+(x-4)\to \\\\ x^{2} + 3x + 2-2x^2+ 5+x-4\to \\\\ - x^{2} +4x7-4\to \\\\ - x^{2} +4x3$