Question

please answer the question 10 please answer the question 10
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Answer 1

Answer:

a-b

Step-by-step explanation:

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

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

$= a - b$

Answer 2

Answer:

a-b

Step-by-step explanation:

using the following identity

$(x + y) \times (x - y) = {x }^{2} - {y}^{2}$

we have, given expression as

${ \sqrt{a} }^{2} - { \sqrt{b} }^{2}$

$=a - b$