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777dan777 [17]
3 years ago
9

Subtract (In picture)

Mathematics
1 answer:
Sonbull [250]3 years ago
6 0

--First we have to simplfy

\frac{2x-8}{x^2-x-12} -\frac{x-3}{x(x+1)}

\frac{2(x-4)}{(x-4)(x+3)} - \frac{x-3}{x(x+1)}

--Cancel common factors

\frac{2}{(x+3)} -\frac{x-3}{x(x+1)}

--Here remember never cancel factors in a subtraction or addition problem

--Now Multiply each side until both denominators are equal to each other

\frac{2[x(x+1)]}{x(x+3)(x+1)} -\frac{(x-3)(x+3)}{x(x+3)(x+1)}

--Simplify

\frac{2x^2+2x}{x(x+1)(x+3)} - \frac{x^2-9}{x(x+1)(x+3)}

--Now that the denominators are the same: subtract!

\frac{2x^2+2x-(x^2-9)}{x(x+1)(x+3)}

\frac{2x^2-x^2+2x+9}{x(x+1)(x+3)}

--And LAST STEP! ......Simplify More.... To get your answer

\frac{x^2+2x+9}{x(x+1)(x+3)}


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