Question

1)   cho;  f(x) = 2x³ + 3x² – 2x – a

            g(x) = x – 1

Answer 1

Để \(f\left(x\right)⋮g\left(x\right)\Leftrightarrow2x^3+3x^2-2x-a=\left(x-1\right)\cdot a\left(x\right)\)

Thay \(x=1\Leftrightarrow2+3-2-a=0\Leftrightarrow a=3\)