Q. Simplify the following expression completely.x2+3x−40x2−8x+15Answer:
Factor Numerator and Denominator: Factor the numerator and the denominator.The numerator x2−8x+15 can be factored into (x−3)(x−5) because (x−3)(x−5)=x2−5x−3x+15=x2−8x+15.The denominator x2+3x−40 can be factored into (x+8)(x−5) because (x+8)(x−5)=x2−5x+8x−40=x2+3x−40.
Rewrite with Factored Forms: Rewrite the expression with the factored forms.The expression becomes:(x+8)(x−5)(x−3)(x−5)
Cancel Common Factors: Cancel out the common factors.The (x−5) term is present in both the numerator and the denominator, so they cancel each other out.The expression simplifies to:(x−3)/(x+8)
Check for Further Simplification: Check for any further simplification. There are no common factors left, and neither the numerator nor the denominator can be factored further. Therefore, the expression is fully simplified.
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