# math

posted by .

ã49 + ã343 - ã2401 =

• math -

sqrt 49 + sqrt 343 - sqrt 2401 ???
343 = 7^3
2401 = 7^4
so I have
7 + 7 sqrt 7 + 49
= 56 + 7 sqrt 7

• negative sign -

forgot the negative
7 + 7 sqrt 7 - 49
- 42 + 7 sqrt 7

## Similar Questions

1. ### math

actually, in a addition to the question i posted a few minutes ago, can someone please help me with a few actual specific questions?
2. ### Algebra

What number is equal to ã49
3. ### Math

Rewrite 6 ã49/18 with a rational denominator.
4. ### Math

Rewrite 6 ã49/18 with a rational denominator.

Solve each system 3x+2y= -2 9x- y= -6 I know how to solve for x but i get really lost trying to figure out how to solve for the second variable
6. ### algebra

ã16+ã49 = 11 (4+7)Am I correct?
7. ### math 12

i got the wrong answer from the back, and i know that imnot dooing it right. please try to help me on this hard question. THE ANSWER WAS:16 solve the equation: 3log(x-15)= (1/4)^x i don't know how to solve it algerbrically. the teacher …