√7+√5/√7-√5
is equal to
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Answered by
72
√7+√5/√7-√5
=(√7+√5)(√7+√5)/(√7-√5)(√7+5)
=(√7+√5)²/(√7)²-(√5)²
=(√7)²+2×√7×√5+(√7)²/7-5
=7+5+2√35/2
=12+2√35/2
=2(6+√35)/2
=(6+√35)
Answered by
55
√7+√5/√7-√5
=(√7+√5)(√7+√5)/(√7-√5)(√7+5)
=(√7+√5)²/(√7)²-(√5)²
=(√7)²+2×√7×√5+(√7)²/7-5
=7+5+2√35/2
=12+2√35/2
=2(6+√35)/2
=(6+√35)
Hope its help
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