Q. Perform the following operation and express in simplest form.x2−17x+72x3⋅3x+24x2−64Answer:
Factor Quadratic Expressions: Factor the quadratic expressions where possible.We have the expression (x2−17x+72x3)×(3x+24x2−64). Let's start by factoring the quadratic expressions in the denominators and the numerator where possible.The quadratic x2−17x+72 can be factored into (x−8)(x−9), because 8×9=72 and 8+9=17.The quadratic x2−64 is a difference of squares and can be factored into (x+8)(x−8).The linear term 3x+24 can be factored out as 3(x+8).
Rewrite with Factored Terms: Rewrite the expression with factored terms.Now we rewrite the original expression using the factored forms:(x−8)(x−9)x3×3(x+8)(x+8)(x−8)
Cancel Common Factors: Cancel out common factors.We can now cancel out the common factors in the numerator and the denominator:The (x−8) terms cancel out, and one (x+8) term cancels out.This leaves us with:x−9x3×31
Simplify Expression: Simplify the expression.Now we simplify the expression by multiplying the numerators and denominators:(x−9)×3x3×1This simplifies to:3(x−9)x3
Check for Further Simplification: Check for any further simplification. There are no common factors left to cancel, and the expression is as simple as it can be.
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