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

1 Answer
Ori Kiko
Nov 16, 2017

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

Explanation:

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))#

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