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Marina CMI [18]
3 years ago
14

2. Simplify the expression x^2+x-28/x^2-7x+12

Mathematics
1 answer:
tankabanditka [31]3 years ago
5 0
The answer is   x^4-6x^3+12x^2-28/x^2


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Step-by-step explanation:

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let's firstly convert the mixed fraction to improper fraction and then take it from there, keeping in mind that the whole is "x".

\stackrel{mixed}{5\frac{5}{6}}\implies \cfrac{5\cdot 6+5}{6}\implies \stackrel{improper}{\cfrac{35}{6}} \\\\[-0.35em] ~\dotfill\\\\ \cfrac{7}{3}x~~ = ~~5\frac{5}{6}\implies \cfrac{7}{3}x~~ = ~~\cfrac{35}{6}\implies 42x=105\implies x=\cfrac{105}{42} \\\\\\ x=\cfrac{21\cdot 5}{21\cdot 2}\implies x=\cfrac{21}{21}\cdot \cfrac{5}{2}\implies x=1\cdot \cfrac{5}{2}\implies x=2\frac{1}{2}

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Step-by-step explanation:

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3 years ago
van purchased a dvd player on sale. the initial price was $175.90. the price after the discount was $141.37. what was the percen
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Step-by-step explanation: because it is

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