Question

(√a + √b) (√a – √b) is
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Answer 1

Answer:

a-b

Step-by-step explanation:

( a - b ) ( a+ b ) = a^2 - b^2

therefore

( root a + root b ) ( root a - root b ) = a - b  

Answer 2

Answer:

a-b

Step-by-step explanation

(\sqrt{a} + \sqrt{b})(\sqrt{a} -\sqrt{b}

By using (a-b)(a+b)=a^2-b^2

root a^2 - root b^2

=a - b