Question

6. Value of the polynomial x3 -2x2 +x+1 at x = -1 is -------------

Answer 1

Answer:

$x3 - 2 \times 2 + x + 1$

$replace \: x \: by \: - 1$

$( - 1) \times 3 - 2 \times 2 + ( - 1) + 1 = - 3 - 4 + 0 = - 7$

The answer is -7.

HOPE YOU UNDERSTAND!!!