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    Simplify: x3−3x2+9x−12−x3−7x2−8x−16.x^3-3x^2+9x-12-x^3-7x^2-8x-16.x3−3x2+9x−12−x3−7x2−8x−16.​​
    Question

    Simplify: x33x2+9x12x37x28x16.x^3-3x^2+9x-12-x^3-7x^2-8x-16.​​

    A.

    10x2+x2810x^2+x-28​​

    B.

    10x2+x+28-10x^2+x+28​​

    C.

    10x2+x28-10x^2+x-28​​

    D.

    10x2x2810x^2-x-28​​

    Correct option is C

    Given:

    x33x2+9x12x37x28x16.x^3-3x^2+9x-12-x^3-7x^2-8x-16. 

    Solution:

    x33x2+9x12x37x28x16.x^3-3x^2+9x-12-x^3-7x^2-8x-16.

    x3x33x27x2+9x8x1216x^3-x^3-3x^2-7x^2+9x-8x-12-16 

    10x2+x28-10x^2+x-28 

    Thus the correct answer is (C)


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