Question

Could someone help me learn how to do this?? I will give a medal and fan to whoever help me learn the best!
Find the exact value of the expression 4 sqrt 13 + sqrt 6 - 7 sqrt 13

Answer 1

\(\sqrt{2}+\sqrt2 = 2\sqrt{2}\) right?
similarly, \(4\sqrt{13} - 7\sqrt{13} = -3\sqrt{13}\).
Can you "put together" \(\sqrt{13}\) and \(\sqrt{6}\) ?

Answer 2

@reemii i'm not sure

Answer 3

you can't. the numbers under the root must be equal. the answer is a sum of two terms (you put the \(\sqrt{13}\) together as i wrote above alr.

Answer 4

So \[-3\sqrt{13} + \sqrt{16}\] ???

Answer 5

@reemii

Answer 6

yes (but it's 6, not 16)

Answer 7

Oops, my bad, thank you!