Question

Find the value of p(1)+p(_1)for the polynomial p(x)=xcube_2xsquare_5x+3

Answer 1

Answer:

given,.

p(x) = x³ - 2x² -4x + 3

so

p(-1) = (-1)³ -2 × (-1)² -4 × (-1) +3

= -1 -2 × 1 + 4 + 3

= -1 -2 + 7

= 4

and .

p(1)= 1³ -2 × 1² -5 × 1 +3

= 1 -2 -5 + 3

= 4 - 7

= -3

so,

p(1) + p( -1) = -3 + 4

= 1

so, the answer is 1.