Question

1. Find the value of the polynomial 4x2 - 5x+3, when
(i) x=0
(ii) x=-1
(iii) x=2
iv) x=1/2

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Answer 1

Answer:

Polynomial p (x) = 4x²-5x+3

(I) x = 0

Substituting x in the given polynomial

4(0)²-5(0)+3

0-0+3

3

(ii) Substituting x = - 1 in the given polynomial

4(-1)²-5(-1)+3

4-6+3

4-3

1

(iii) Substituting x=2 in the given polynomial

4(2)²-5(2)+3

4(4)-10+3

8-10+3

8-7

1

(iv) Substituting x=1/2 in the given polynomial

4(1/2)² - 5(1/2)+3

1 - 5/2 + 3

Lcm = 2

2-5+6/2

1/2