How do you multiply $[sqrt(2) + sqrt(7)]*[sqrt(3) - sqrt(7)]$ ?

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Answer 1 · 2015-07-06T21:26:12

Use the FOIL method for multiplying two binomials.

The FOIL method for multiplying two binomials indicates the order in which the terms should by multiplied.
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$(sqrt2+sqrt7)(sqrt3-sqrt7)$ =

$sqrt2sqrt3-sqrt2sqrt7+sqrt7sqrt3-sqrt7sqrt7$ =

$sqrt6-sqrt14+sqrt21-7$

How do you multiply [sqrt(2) + sqrt(7)]*[sqrt(3) - sqrt(7)][sqrt(2) + sqrt(7)]*[sqrt(3) - sqrt(7)]?