SOLUTION: Could you solve the following equations involving radical expressions. Thank you. 1) a^3 - 54=0 2) 2*3rd(x+4) = 10

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Could you solve the following equations involving radical expressions. Thank you. 1) a^3 - 54=0 2) 2*3rd(x+4) = 10      Log On


   

Question 362969: Could you solve the following equations involving radical expressions. Thank you.
1) a^3 - 54=0
2) 2*3rd(x+4) = 10
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
a%5E3+-+54=0
a%5E3=+54
highlight%28a=root%283%2C54%29%29 or approximately
a=3.78
.
.
.
Please explain this "2*3rd".
Is that the cube root of %28x%2B4%29?
If so, then
2%2Aroot%283%2C%28x%2B4%29%29=10
root%283%2C%28x%2B4%29%29=5
x%2B4=125
highlight%28x=121%29
If that's not what you meant, please re-post.