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9th Class Mathematics Polynomials Question Bank Polynomials

  • question_answer
    If\[{{x}^{2}}+kx+6=(x+2)(x+3)\]for all\[x\], what is the value of\[k\]?

    A)  \[1\]                            

    B)  \[6\]                

    C)  \[5\]                

    D)         \[3\]                

    Correct Answer: C

    Solution :

    \[{{x}^{2}}+kx+6=(x+2)(x+3)\] \[\Rightarrow \]\[{{x}^{2}}+kx+6={{x}^{2}}+5x+6\] By comparing L.H.S and R.H.S the value of k is 5.


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