Find the value of the polynomial 5x – 4x 2 + 3 at
(i) x = 0 (ii) x = –1 (iii) x = 2
Find the value of the polynomial 5x – 4x 2 + 3 at
(i) x = 0 (ii) x = –1 (iii) x = 2
Solution and Explanation
(i) p(x) = 5x - 4x2 + 3
= p(0) = 5(0) - 4(0)2 + 3
= 3
(ii) p(x) = 5x - 4x2 + 3 = p(-1)
= 5(-1) - 4 (-1)2 + 3
= -5 - 4 (1) + 3
= -6
(iii) p(x) = 5x - 4x2 + 3
= p(2) = 5(2) - 4(2)2 + 3
= 10 - 16 + 3 = -3
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