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Check whether 7+3x is a factor of 3×3+7x. Q.3

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How i solve this problem in easy and simple of class 9th ncert math of Polynomials chapter of exercise 2.3 of question no.3, how i solve this problem in simple way Check whether 7+3x is a factor of 3×3+7x.

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  1. 7+3x = 0

    ⇒ 3x = −7

    ⇒ x = -7/3

    ∴Remainder:

    3(-7/3)3+7(-7/3) = -(343/9)+(-49/3)

    = (-343-(49)3)/9

    = (-343-147)/9

    = -490/9 ≠ 0

    ∴7+3x is not a factor of 3x3+7x

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