Q. Fully simplify the expression below and write your answer as a single fraction.x2+xx3−x⋅x2−9x+86x2+6x−432Answer:
Factor Numerator and Denominator: Factor the numerator and denominator of both fractions where possible.The first fraction's numerator can be factored by recognizing it as a difference of squares:x3−x=x(x2−1)=x(x+1)(x−1)The first fraction's denominator is already factored:x2+x=x(x+1)The second fraction's numerator does not factor nicely, but we can factor out a common factor of 6:6x2+6x−432=6(x2+x−72)The second fraction's denominator can be factored as a quadratic:x2−9x+8=(x−1)(x−8)
Rewrite with Factored Terms: Rewrite the expression with the factored terms.Now we have:x(x+1)x(x+1)(x−1) * (x−1)(x−8)6(x2+x−72)
Cancel Common Factors: Cancel out the common factors in the numerator and denominator.In the first fraction, x and (x+1) are common to both the numerator and the denominator, so they cancel out. In the second fraction, (x−1) is common to both the numerator and the denominator, so it cancels out as well.After canceling, we have:(x−1)×(x−8)6(x2+x−72)
Expand Remaining Terms: Expand the remaining terms in the numerator of the second fraction.We need to distribute the 6 to each term inside the parentheses:6(x2+x−72)=6x2+6x−432Now the expression looks like this:(x−1)∗((6x2+6x−432)/(x−8))
Multiply Remaining Terms: Multiply the remaining terms in the numerator.We multiply (x−1) by each term in the numerator of the second fraction:(x−1)(6x2+6x−432)=6x3+6x2−6x−6x2−6x+432
Combine Like Terms: Combine like terms in the numerator.After distributing, we combine the like terms:6x3+6x2−6x−6x2−6x+432=6x3−12x+432Now the expression is:(6x3−12x+432)/(x−8)
Check for Further Simplification: Check for any further simplification.We can factor out a 6 from the numerator to see if there is any further simplification:6x3−12x+432=6(x3−2x+72)However, the expression x3−2x+72 does not factor nicely, and there are no common factors with the denominator (x−8). So, this is the final simplified form.
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