Question

Sendo A = - 2x + 5, B = -5x + 4 e C = 4x -1, determine: C² + 2B – 3A e assinale a alternativa correta. *
A) -16x² - 12x - 6
B) 16x² - 12x + 6
C) 16x² + 12x - 6
D) 16x² - 12x - 6
E) 16x² + 12x + 6

Answer 1

$C^2+2B-3A$

$(4x-1)^2+2(-5x+4)-3(-2x+5)$

$16x^2-4x-4x+1-10x+8+6x-15$

$16x^2-12x-6$

Gabarito: D)