Question

(7x³ + 12x² - 4x + 3) + (-5x² + 7x - 4) =
quando x=(+2)

Answer 1

Resposta:

(7x³ + 12x² - 4x + 3) + (-5x² + 7x - 4)

$7x^{3}+12x^{2} -4x+3-5x^{2} +7x-4\\ 7x^{3} + 7x^{2} +3x-1\\7.(2)^{3} +7.(2)^{2} +3.2-1\\7.8+7.4+6-1\\56+28+5\\56+33\\= 89$