Question 193432
x4-6
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5Y_7

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[x^4/5y] - [6/7]

least common divisor = 35y
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Rewrite each fraction with the lcd as its denominator:

= [7x^4/lcd] - [5y*7/lcd]
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Combine the numerators over the lcd:

= [x^4 - 35y]/lcd

= [x^4- 35y]/35y
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Cheers,
Stan H.