Question

(x-1) is a factor of 12x^4+9x^3+6x^2-11x-a
find a​

Answer 1

${12x}^{4} + {9x}^{3} + {6x}^{2} - 11x - a \\ (x - 1) = 0 \\ x = 1 \\ put \: the \: value \: of \: x = 1 \: in \: equation \\ 12(1) {}^{4} + 9 {(1)}^{3} + 6( {1)}^{2} - 11(1) - a = 0 \\ 12 + 9 + 6 - 11 - a = 0 \\ 27 - 11 - a = 0 \\ 16 - a = 0 \\ 16 = a \\ this \: is \: your \: answer$

this is your answer