How do you solve $5sqrt 18 - sqrt 28 + sqrt 63 - sqrt 8$ ?

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Answer 1 · 2016-06-21T09:33:23

$5sqrt18-sqrt28+sqrt63-sqrt8=13sqrt2+sqrt7$

$5sqrt18-sqrt28+sqrt63-sqrt8$

= $5sqrt(2xx3xx3)-sqrt(2xx2xx7)+sqrt(3xx3xx7)-sqrt(2xx2xx2)$

= $5xx3xxsqrt2-2xxsqrt7+3xxsqrt7-2xxsqrt2$

= $15sqrt2-2sqrt7+3sqrt7-2sqrt2$

= $13sqrt2+sqrt7$

How do you solve 5sqrt 18 - sqrt 28 + sqrt 63 - sqrt 85sqrt 18 - sqrt 28 + sqrt 63 - sqrt 8?