Question

If p(x) = x^2 – 4x +3 , evaluate: p(2) – p(—1).

Answer 1

p(x) = x^2 – 4x +3

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★To find :-

p(2) - p(-1)

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p(2) = 2^2 -4(2) + 3

= 4 - 8 + 3

= -4 +3

= -1

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p(-1) = (-1) ^2 - 4(-1) + 3

= 1 + 4 + 3

= 8

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p(2) - p(-1)

-1 - (8)

= -9

Answer 2

Step-by-step explanation:

Correction:

$\bf \underline{Solution-}$

We have p(x) = x² - 4x + 3

p(2) - p(-1) + p(1/2)

= (2² - 4 × 2 + 3) - {(-1)² - 4(-1) + 3} + {(½)² - 4 × ½ + 3}

= (4 - 8 + 3) - (1 + 4 + 3) + (¼ - 2 + 3)

= - 1 - 8 + ⁵/₄

= - 9 + ⁵/₄

= (-36 + 5)/4

= -31/4 Ans.