Question

-x elevado a 3 + 5x elevado a 2 + 1, quando x = -4

Answer 1

$-x^3+5x^2+1~~~para~~x=-4\\ \\ -(-4)^3+5(-4)^2+1=\\ \\ -(-64)+5(+16)+1=\\ \\ +64+80+1=145$