Question

plzz ans to this ques
​

Answer 1

♪Question:-

Expand:-

→(3-√7)×(3+√7)

♦Answer:-

→2

$\rule{200}{1}$

★Proof:-

[°•° (a+b)×(a-b)=a²-b²]

→(3-√7)×(3+√7) can be written as (3+√7)×(3-√7)

→(3+√7)×(3-√7)

→(3)²-(√7)²

→9-7

→2

•Hence,on Solving/expanding (3-√7)(3+√7) we get the Answer 2 .

$\rule{200}{8}$

Answer 2

QUESTION:

$(3 - \sqrt{7} )(3 + \sqrt{7} )$

SOLUTION:

$(3 - \sqrt{7} )(3 + \sqrt{7} ) \\ = {(3)}^{2} - ( \sqrt{7} ) {}^{2} \\ = 9 - 7 \\ = 2$

ANSWER:

2