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

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Answer 1 · 2017-11-16T22:07:04

$23 \sqrt{21 x^{13}}$ $23sqrt(21x^(13))$

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

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

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

How do you add 13√21x13+10√21x1313\sqrt { 21x ^ { 13} } + 10\sqrt { 21x ^ { 13} }?