Question

simplyfi (4+root2)(4-root2)

Answer 1

this image will help uuu...

Answer 2

$(4 + \sqrt{2} )(4 - \sqrt{2} )$
$(a + b)(a - b) = ( {a}^{2} - {b}^{2} )$
$= {(4)}^{2} - {( \sqrt{2}) }^{2}$
=16-2=14..
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