Q. Perform the following operation and express in simplest form.x2−x−12x2−16⋅4x−329x+27Answer:
Factor Polynomials: First, factor each polynomial where possible.The numerator x2−16 is a difference of squares and can be factored into (x+4)(x−4).The denominator x2−x−12 can be factored into (x−4)(x+3) by finding two numbers that multiply to −12 and add to −1.The numerator 9x+27 is a common factor problem and can be factored into 3(3x+9), which simplifies further to 3(3)(x+3) since 9 is also a factor of (x+4)(x−4)0.The denominator (x+4)(x−4)1 is also a common factor problem and can be factored into (x+4)(x−4)2.
Rewrite with Factored Terms: Now, rewrite the original expression with the factored terms. (x−4)(x+3)(x+4)(x−4)×4(x−8)3(3)(x+3)
Cancel Common Factors: Next, cancel out the common factors from the numerator and the denominator.The (x−4) terms cancel each other, and the (x+3) terms cancel each other.This leaves us with:4⋅(x−8)(x+4)⋅3⋅3
Simplify Expression: Simplify the remaining expression by multiplying the constants together. 3×3=9, so the expression becomes: 4(x−8)9(x+4)
Final Simplified Form: The expression is now simplified as much as possible, and there are no common factors left to cancel.The final simplified form is:(9(x+4))/(4(x−8))
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