How do you add $13\sqrt { 21x ^ { 13} } + 10\sqrt { 21x ^ { 13} }$ ?

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Answer 1 · 2017-11-16T22:07:04

$23sqrt(21x^(13))$

There's a common factor $sqrt(21x^(13))$ which we can take out,
$sqrt(21x^(13))(13+10)$

as $13+10=23$ we can simplify,
$sqrt(21x^(13))(23)$

and we write it "correctly",
$23sqrt(21x^(13))$

How do you add 13\sqrt { 21x ^ { 13} } + 10\sqrt { 21x ^ { 13} }13\sqrt { 21x ^ { 13} } + 10\sqrt { 21x ^ { 13} }?