How do you simplify $2sqrt20 - 3sqrt7 - 2sqrt5 + 4sqrt63$ ?

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Answer 1 · 2015-07-10T17:23:57

$=2sqrt5 +9sqrt7$

$sqrt20 =sqrt(2*2*5) = color(blue)(2sqrt5$

$sqrt63= sqrt(3*3*7) = color(blue)(3sqrt7$

The expression becomes:

$2*color(blue)(2sqrt5 - 3sqrt7 - 2sqrt5 + 4* color(blue)(3sqrt7$

$=4sqrt5 - 3sqrt7 - 2sqrt5 + 12sqrt7$
$=2sqrt5 +9sqrt7$

How do you simplify 2sqrt20 - 3sqrt7 - 2sqrt5 + 4sqrt632sqrt20 - 3sqrt7 - 2sqrt5 + 4sqrt63?