Q. Perform the following operation and express in simplest form.x2−14x+48x4−6x3÷x2−64xAnswer:
Factor Denominator: Factor the denominator of the first fraction and the numerator and denominator of the second fraction.The denominator x2−14x+48 can be factored into (x−6)(x−8) because 6×8=48 and 6+8=14.The numerator x of the second fraction remains the same.The denominator x2−64 is a difference of squares and can be factored into (x+8)(x−8).
Rewrite as Multiplication: Rewrite the division as multiplication by the reciprocal.The division of two fractions can be rewritten as the multiplication of the first fraction by the reciprocal of the second fraction.(x4−6x3)/(x2−14x+48)÷(x)/(x2−64)=(x4−6x3)/(x2−14x+48)×(x2−64)/(x)
Factor Numerator: Factor the numerator of the first fraction if possible.The numerator x4−6x3 can be factored by taking out the common factor x3, which gives us x3(x−6).
Cancel Common Factors: Cancel out common factors.Now we have x3(x−6)/(x−6)(x−8)×(x+8)(x−8)/x. We can cancel out the common factors (x−6) and (x−8) from the numerator and denominator.This leaves us with x3/(x−8)×(x+8)/x.
Cancel Factor of x: Cancel out the common factor of x. We can cancel out the x from the numerator of the second fraction and the denominator of the first fraction. This leaves us with x2∗(x+8).
Multiply Expressions: Multiply the remaining expressions.Now we multiply x2 by (x+8) to get the final simplified form.x2∗(x+8)=x3+8x2.
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