How do you simplify $( 7 + sqrt3 ) (7 - sqrt3)$ ?

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Answer 1 · 2016-07-01T22:59:32

$= 46$

you use this idea

$(a-b)(a+b)$

$= a^2 + ab - ab - b^2$

$= a^2 - b^2$

so you should get

$7^2 - (sqrt 3)^2$

$= 49 - 3$

$= 46$

How do you simplify ( 7 + sqrt3 ) (7 - sqrt3)( 7 + sqrt3 ) (7 - sqrt3)?