Mathematics: Algebra need to solve question

Algebra need to solve question - id10252077, tartcandi303

salvadorperez26

16.03.2022

Step-by-step explanation:

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

First do 3 x 3 = 9 - keep this 9 to the side for now

Then do 3 x $-\sqrt{7}$ = $-\sqrt{21}$ - also keep this to the side for now

Then do $\sqrt{7}$ x 3 = $\sqrt{21}$

Then do $-\sqrt{7}$ x $\sqrt{7}$ = -7

So,

9 $-\sqrt{21}$ + $\sqrt{21}$ - 7

Therefore, 9-7 = 2

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Rock3422

02.02.2021

Step-by-step explanation:

Hope it will help you...

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