multiply, assume that all variables represent positive real numbers (square root

label Algebra
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(sqrt7+2)(sqrt7-2)

Jul 25th, 2015

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(sqrt7+2)(sqrt7-2)

=√7 * √7 - √7*2 + 2* √7 - 2*2

= 7 - √7*2 + 2* √7 - 4

= 7 - 4

= 3...................ANSWER


answer is 3


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Jul 25th, 2015

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