Question

the value of (root a + root b) (root a -root b)

Answer 1

Step-by-step explanation:

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

so answer is a - b

Answer 2

Answer:

$(\sqrt{a} + \sqrt{b} )( \sqrt{a} - \sqrt{b} ) = ( \sqrt{a} ) {}^{2} - ({ \sqrt{b} })^{2}$

$= a - b$

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