Question

 (√a + √b) (√a – √b) is


a + b

a – b

2√a

2√b

​

Answer 1

Answer:

$( \sqrt{a} + \sqrt{b} )( \sqrt{a} - \sqrt{b} ) \\ using \: \: this \: \: identity \\ (x + y)(x - y) = {x}^{2} - {y}^{2} \\ ( \sqrt{a} + \sqrt{b} )( \sqrt{a} - \sqrt{b} ) = ( \sqrt{a} {)}^{2} - ( \sqrt{b} {)}^{2} \\ = a - b$

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Answer 2

Answer:

answer is

a - b

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