Q. Fully simplify the expression below and write your answer as a single fraction.x2+11x+28x3+x2−12x⋅x5−7x4+12x3x−4Answer:
Factor Numerator and Denominator: Factor the numerator and the denominator of the first fraction.The numerator x3+x2−12x can be factored by taking out the common factor x:x(x2+x−12)Now, factor the quadratic x2+x−12:x(x+4)(x−3)The denominator x2+11x+28 can be factored into:(x+4)(x+7)So the first fraction becomes:(x+4)(x+7)x(x+4)(x−3)
Cancel Common Factors: Cancel out the common factors in the first fraction.The (x+4) term is present in both the numerator and the denominator, so they cancel each other out:(x+7)x(x−3)
Factor Denominator: Factor the denominator of the second fraction.The denominator x5−7x4+12x3 can be factored by taking out the common factor x3:x3(x2−7x+12)Now, factor the quadratic x2−7x+12:x3(x−3)(x−4)So the second fraction becomes:(x−4)/x3(x−3)(x−4)
Cancel Common Factors: Cancel out the common factors in the second fraction.The (x−4) term is present in both the numerator and the denominator, so they cancel each other out:x3(x−3)1
Multiply Simplified Fractions: Multiply the simplified first fraction by the simplified second fraction. (x+7)x(x−3)×x3(x−3)1Now, cancel out the common (x−3) term:(x+7)x×x31
Combine Fractions: Simplify the expression by combining the fractions. x+7x×x31 can be simplified by multiplying the numerators and denominators: (x+7)×x3x×1This simplifies to:x4+7x3x
Check Further Simplification: Check for any further simplification. There are no common factors left to cancel, and the expression is as simplified as it can be.
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