Question

find the value of polynomial x^3-2x^2+8 at x =-1

Answer 1

x = - 1

Put above value of x in the polynomial

p(x) => x³ - 2x² + 8

p(-1) => (-1)³ - 2×(-1)² + 8

=> -1 - 2 + 8

=> - 3 + 8

=> 5 ...ans....

Answer 2

Hola mate! Here Is your answer:

Given:

${x}^{3} - 2 {x}^{2} + 8$

Values of x is given (- 1)

Solution:

Put the value of x in polynomial

${ - 1}^{3} - 2({ - 1}^{2} ) + 8$

=5

Hope it helps!