Question

4. O valor de k no polinomio p(x) = x3 + (k-1)x2 - 2x + 1 para p(2) = -3 é​

Answer 1

$p( 2) =2^{3} +( k-1) \cdotp 2^{2} -2\cdotp 2+1=-3 \\ \\ \Longrightarrow 8+4k-4-4+1=-3 \\ \\ \Longrightarrow 4k=-4 \\ \\ \Longrightarrow \boxed{\boxed{k=-1}}$