Question

both X + 1 are the factors of x squared plus x cube x square - 2 X + b find the value of ab

Answer 1

f(x) =
$x {2} + x {3} \times x {2} - 2x + b$
$x + 1 = 0 \\ x = - 1$
f(-1)=
$(1) {2} + (1) {3} \times (1) {2} - 2(1) + b = 0 \\ 0 + b = 0 \\ b = 0$
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