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Find the value of f (x)=3x^3-4x^2+7x+5 …

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Find the value of f (x)=3x^3-4x^2+7x+5 when x=3 and x=-3

Posted by Vijay Laxmi 5 years, 11 months ago

Yogita Ingle 5 years, 11 months ago

p(x) = 3x³ - 4x² + 7x - 5

Remainder when x = 3 divides p(x) is

p(3) = 3 3³ - 4 3² + 7 3 - 5

= 3 27 - 4 9 + 21 - 5 = 61

Remainder when x = - 3 divides p(x) is

p(-3) = 3 (-3)³ - 4(-3)² + 7 (-3) - 5

= 3 (-27) - 4 9 - 21 - 5

= -143

Therefore, the required remainders are 61 and -143.

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