Q. Subtract.The numerator should be expanded and simplified. The denominator should be either expanded or factored.x−14−x−79=
Identify Common Denominator: Identify the common denominator for the two fractions.In order to subtract the fractions, we need a common denominator. The common denominator for (x−1) and (x−7) is the product of the two, which is (x−1)(x−7).
Rewrite with Common Denominator: Rewrite each fraction with the common denominator.We need to adjust each fraction so that they both have the common denominator (x−1)(x−7). This means multiplying the numerator and denominator of each fraction by the missing factor.For the first fraction, x−14, we multiply the numerator and denominator by (x−7).For the second fraction, x−79, we multiply the numerator and denominator by (x−1).
Perform Multiplication: Perform the multiplication for each fraction.Now we multiply the numerators and denominators as planned in Step 2.(4)/(x−1) becomes (4⋅(x−7))/((x−1)⋅(x−7))=(4x−28)/((x−1)⋅(x−7))(9)/(x−7) becomes (9⋅(x−1))/((x−7)⋅(x−1))=(9x−9)/((x−7)⋅(x−1))
Subtract Fractions: Subtract the two fractions.Now that both fractions have the same denominator, we can subtract the numerators and keep the common denominator.(x−1)⋅(x−7)(4x−28)−(9x−9)
Expand and Simplify: Expand and simplify the numerator.We need to distribute the subtraction across the numerators.(4x−28)−(9x−9)=4x−28−9x+9Now combine like terms.4x−9x=−5x−28+9=−19So the simplified numerator is −5x−19.
Write Final Expression: Write the final simplified expression.The final simplified expression is (−5x−19)/((x−1)∗(x−7)).