If sqrt(a) + sqrt(b) -sqrt(c) = 0 find the value of (a+b-c)^2
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√a+√b-√c=0
or,√a+√b=√c
squaring on both sides
or,a+2√(ab)+b=c
or,a+b-c=-2√ab
now
(a+b-c)^2
=(-2√ab)^2
=4ab
√a+√b-√c=0
or,√a+√b=√c
squaring on both sides
or,a+2√(ab)+b=c
or,a+b-c=-2√ab
now
(a+b-c)^2
=(-2√ab)^2
=4ab
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