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Subtract.
The numerator should be expanded and simplified. The denominator should be either expanded or factored.

(4)/(x-1)-(9)/(x-7)=

Subtract.\newlineThe numerator should be expanded and simplified. The denominator should be either expanded or factored.\newline4x19x7= \frac{4}{x-1}-\frac{9}{x-7}=

Full solution

Q. Subtract.\newlineThe numerator should be expanded and simplified. The denominator should be either expanded or factored.\newline4x19x7= \frac{4}{x-1}-\frac{9}{x-7}=
  1. Identify Common Denominator: Identify the common denominator for the two fractions.\newlineIn order to subtract the fractions, we need a common denominator. The common denominator for (x1)(x-1) and (x7)(x-7) is the product of the two, which is (x1)(x7)(x-1)(x-7).
  2. Rewrite with Common Denominator: Rewrite each fraction with the common denominator.\newlineWe need to adjust each fraction so that they both have the common denominator (x1)(x7)(x-1)(x-7). This means multiplying the numerator and denominator of each fraction by the missing factor.\newlineFor the first fraction, 4x1\frac{4}{x-1}, we multiply the numerator and denominator by (x7)(x-7).\newlineFor the second fraction, 9x7\frac{9}{x-7}, we multiply the numerator and denominator by (x1)(x-1).
  3. Perform Multiplication: Perform the multiplication for each fraction.\newlineNow we multiply the numerators and denominators as planned in Step 22.\newline(4)/(x1)(4)/(x-1) becomes (4(x7))/((x1)(x7))=(4x28)/((x1)(x7))(4\cdot(x-7))/((x-1)\cdot(x-7)) = (4x - 28)/((x-1)\cdot(x-7))\newline(9)/(x7)(9)/(x-7) becomes (9(x1))/((x7)(x1))=(9x9)/((x7)(x1))(9\cdot(x-1))/((x-7)\cdot(x-1)) = (9x - 9)/((x-7)\cdot(x-1))
  4. Subtract Fractions: Subtract the two fractions.\newlineNow that both fractions have the same denominator, we can subtract the numerators and keep the common denominator.\newline(4x28)(9x9)(x1)(x7)\frac{(4x - 28) - (9x - 9)}{(x-1)\cdot(x-7)}
  5. Expand and Simplify: Expand and simplify the numerator.\newlineWe need to distribute the subtraction across the numerators.\newline(4x28)(9x9)=4x289x+9(4x - 28) - (9x - 9) = 4x - 28 - 9x + 9\newlineNow combine like terms.\newline4x9x=5x4x - 9x = -5x\newline28+9=19-28 + 9 = -19\newlineSo the simplified numerator is 5x19-5x - 19.
  6. Write Final Expression: Write the final simplified expression.\newlineThe final simplified expression is (5x19)/((x1)(x7))(-5x - 19)/((x-1)*(x-7)).

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