Question

hello guyz plz answer the questions fastly!!!!​

Answer 1

$5)4 {x}^{3} - 3 {x}^{2} + 2x - 4 \\ \\ x + 2 = 0 \\ \\ x = - 2 \\ \\ = 4( - 2) ^{3} - 3( - 2)^{2} + 2( - 2) - 4 \\ \\ = - 32 - 12 - 4 - 4 \\ \\ = - 44 - 8 \\ \\ = - 52$

$6) {x}^{4} + {x}^{3} - 2 {x}^{2} + x + 1 \\ \\ x - 1 = 0 \\ \\ x = 1 \\ \\ = 1 + 1 - 2 + 1 +1 \\ \\ = 2$