Question

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Answer 1

option c is your answer.

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Answer 2

√a+ √b- √c =0

or, √a+√b= √c

squaring both side,

(√a)2 + 2√a√b+(√b)2 =(√c)2

or, a+b+2√ab = c

or, a+b-c = 2√ab

Again squaring both side

(a+b-c)2 =(-2√ab )2

or, (a+b-c)2= 4ab

the answer is c) 4ab