(a+√(ab)+b)^2 - (a-√(ab)+b)^2
Разделить на
b(2a)^2 + a(2b)^2,
Если ab>0
Варианты ответа:
1)√а + √b
2)1/√(ab)
3)1/√a + 1/√b
4)1/(√a+√b)
5)2√b/(ab - 1)
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