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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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