Question

3x³- 9x²-x+ 8, x= -2​

Answer 1

Answer:-

Here,

3x²- 9x² - x+8

=3(-2)³-9(-2)²-(-2)+8

=3×(-8) -36+2+8

=-24-36+10

=-60+10

=-50

.

. . x = -50

Answer 2

Step-by-step explanation:

$3 {x}^{3} - 9 {x}^{2} - 2 + 8 = 3 {x}^{3} - 9 {x}^{2} + 6 = 3( {x}^{3} - 3 {x}^{2} + 2) =3( {x}^{3} - {x}^{2} - 2 {x}^{2} + 2x - 2x + 2) = 3 ( {x}^{2} \times (x - 1) - 2x \times (x - 1) - 2(x - 1) = 3(x - 1) \times ( {x}^{2} - 2x - 2)$