Question

Simplify the question.​

Answer 1

Step-by-step explanation:

here the formula is (a+b)(a-b)=a²-b²

so,(√5+3)(√5-3)

(√5)²-(3)²

5-9

= -4 is the answer.

i hope will be helpful to you.

Answer 2

Answer :-

• (√5 + 3 ) ( √5 - 3 ) => -4

To Find :-

• $\sf \: The \: value \: of( \sqrt{5} + 3)( \sqrt{5} - 3)$

Identity Used :-

• $\bigstar\boxed{ \underline{ \sf{ \green{(x + y)(x - y) = ({x}^{2} - {y}^{2} )}}}}$

Step By Step Solution :-

In the given question we have to find the value of (√5 + 3) (√5 - 3 ) .

So let's do it !!

According to identity ⤵

$\bigstar\boxed{ \underline{ \sf{ \purple{(x + y)(x - y) = ({x}^{2} - {y}^{2} )}}}}$

So by substituting the Identity in the given question.

$\implies \sf({ \sqrt{5} })^{2} - {(3)}^{2} \\ \\ \implies \sf5 - 9 \\ \\ \implies \sf - 4$

Therefore (√5 + 3) (√5 - 3 ) => -4

__________________________