Question

Evaluate each of the following polynomials for the indicated value of the variable:
(i) x2 – 25 for x = 5
(ii) x2 + 3x – 5 for x = –2

Answer 1

Step-by-step explanation:

i) x2 – 25 for x = 5

5^2 - 25

25- 25=0

so it's a polynomial

(ii) x2 + 3x – 5 for x = –2

-2^2 + 3× (-2) -5

4 - 6 -5

4-11

-7

it's not a polynomial as answer is not zero

Answer 2

1)(x2-25) for x=5
=5(2)-25
=10-25
=-15

2)(x2+3x-5) for x=-2
=[-2(2)]+[3(-2)]-5
=-4-6-5
=-15