F(X) = 4x3 − 12x2 + 14x − 3, G(X) 2x − 1

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Question

f(x) = 4x3 − 12x2 + 14x − 3, g(x) 2x − 1

Answer in Brief
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SolutionShow Solution

Let us denote the given polynomials as

`f(x) = 4x^2 - 12x^3 - 12x^2 + 14x - 3,`

`g(x) = 2x - 1`

`⇒ g (x) = 2 (x - 1/2)`

We have to find the remainder when f(x) is divided by g(x).

By the remainder theorem, when f(x) is divided by g(x) the remainder is

`f(1/2) = 4(1/2)^3 - 12(1/2)^2 + 14 (1/2) - 3`

` = 4 xx 1/8 - 12 xx 1/4 + 14 xx 1/2 - 3`

` = 1/2 -3 + 7 - 3`

`= 3/2`

Now we will calculate the remainder by actual division

So the remainder by actual division is `3/2` .

shaalaa.comFactorising the Quadratic Polynomial (Trinomial) of the type ax2 + bx + c, a ≠ 0. Report Error Is there an error in this question or solution?Q 4Q 3Q 5Chapter 6: Factorisation of Polynomials - Exercise 6.3 [Page 14]

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RD Sharma Mathematics [English] Class 9Chapter 6 Factorisation of PolynomialsExercise 6.3 | Q 4 | Page 14

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