化简:(27a√a-8)/(3a-2√a)-(9a√a-8a+3√a+4)/(a-√a)
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化简可以得到
(27a√a-8)/(3a-2√a)-(9a√a-8a+3√a+4)/(a-√a)
=(3√a-2)*(9a+6√a+4)/(3a-2√a) - (9a√a-8a+3√a+4)/(a-√a)
=(9a+6√a+4)/√a - (9a√a-8a+3√a+4)/(a-√a)
=[(9a+6√a+4)*(√a-1) -(9a√a-8a+3√a+4)]/ (a-√a)
=(9a√a+6a+4√a-9a-6√a-4 -9a√a+8a -3√a-4) / (a-√a)
=(5a-5√a-8)/ (a-√a)
=5 - 8/(a-√a)
(27a√a-8)/(3a-2√a)-(9a√a-8a+3√a+4)/(a-√a)
=(3√a-2)*(9a+6√a+4)/(3a-2√a) - (9a√a-8a+3√a+4)/(a-√a)
=(9a+6√a+4)/√a - (9a√a-8a+3√a+4)/(a-√a)
=[(9a+6√a+4)*(√a-1) -(9a√a-8a+3√a+4)]/ (a-√a)
=(9a√a+6a+4√a-9a-6√a-4 -9a√a+8a -3√a-4) / (a-√a)
=(5a-5√a-8)/ (a-√a)
=5 - 8/(a-√a)
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