Q. Simplify the expression completely if possible.x2−81x2+16x+63Answer:
Factorize Numerator and Denominator: Factor both the numerator and the denominator if possible.The numerator x2+16x+63 can be factored into (x+7)(x+9).The denominator x2−81 is a difference of squares and can be factored into (x+9)(x−9).So, the expression becomes (x+9)(x−9)(x+7)(x+9).
Cancel Common Factors: Cancel out the common factors in the numerator and the denominator.The (x+9) term is present in both the numerator and the denominator, so they cancel each other out.The expression simplifies to x−9x+7.
Check for Further Simplifications: Check for any further simplifications. There are no common factors left, and the expression cannot be simplified further. So, the final simplified expression is (x+7)/(x−9).
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