1 Answer

Veronika D · Answer 1 · 2018-04-02T21:35:20+0000

√2 +√5/√2-√5
multiply √2-√5 numerator and denoinator
√2+√5(√2-√5)/(√2-√5)(√2-√5)
by a²-b²=(a+b)(a-b)
and (a-b)=(a-b)²
(√2)²-(√5)²/(√2-√5)²
2-5/(2+5-2√2√5)
-3/(7-2√2√5)

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