## P.nut1996 Algebra 2 help? Adding and subtracting radical expressions... So lost one year ago one year ago

1. LilHefner3

i got a 100% on that

2. P.nut1996

Wanna help me out?? :)

3. azolotor

What's the question?

4. P.nut1996

$7\sqrt{13x}-15\sqrt{2x}+2\sqrt{13x}-4\sqrt{2x}$

5. satellite73

like asking what is $7y-15z+2y-4z$ exactly

6. azolotor

Just combine like terms

7. P.nut1996

How?

8. satellite73

for example $$7\sqrt{13x}+2\sqrt{13x}=9\sqrt{13x}$$

9. P.nut1996

and $-15\sqrt{2x}-4\sqrt{2x}=-19\sqrt{2x}$

10. satellite73

yes

11. satellite73

put them together and get $9\sqrt{13x}-19\sqrt{2x}$ there is nothing more than can be done

12. satellite73

since $$\sqrt{13x}$$and $$\sqrt{2x}$$ are not like terms, you cannot combine them in one term

13. P.nut1996

So that is all? Wow, that's much easier than I thought! Thank you so much! ;D

14. satellite73

yw

15. satellite73

like most math, it is easy when you know what to do