Q. Perform the following operation and express in simplest form.6xx3+2x2÷x2−49x2+9x+14Answer:
Rewrite as multiplication: First, we need to rewrite the division of the two fractions as a multiplication by the reciprocal of the second fraction.(x3+2x2)/(6x)÷(x2+9x+14)/(x2−49)=(x3+2x2)/(6x)×(x2−49)/(x2+9x+14)
Factor polynomials: Next, we should factor the polynomials in the numerators and denominators where possible.The numerator x3+2x2 can be factored as x2(x+2).The denominator 6x is already factored.The numerator x2−49 is a difference of squares and can be factored as (x+7)(x−7).The denominator x2+9x+14 can be factored as (x+7)(x+2).So, the expression becomes:6xx2(x+2)×(x+7)(x+2)(x+7)(x−7)
Cancel common factors: Now, we can cancel out the common factors in the numerator and the denominator.The x in the denominator of the first fraction cancels with one x from x2 in the numerator.The (x+7) and (x+2) terms cancel out between the second fraction's numerator and denominator.This leaves us with:6x×(x−7)
Multiply remaining terms: Finally, we multiply the remaining terms.6x×(x−7)=6x2−7xThis is the simplified form of the original expression.
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