Question 77167
2/(x-8) + 4/(x+8)
lcd = (x-8)(x+8)
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=2(x+8)/lcd + 4(x-8)/lcd

=[2x+16+4x-32]/lcd

=[6x-16]/lcd

=[2(x-8)]/lcd

=2/(x+8)

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Cheers,
Stan H.