math
posted by kristie .
how would you solve for y in this problem:
x=(y^2+3y)^(1/3)
would it equal: y= x^3/y  3 ?
and what about this problem:
x= 1/[(y^2+3y5)^3]
would it equal: y = y/x + 5/y  3?
I would appreciate your help very much!
<<how would you solve for y in this problem:
x=(y^2+3y)^(1/3)
would it equal: y= x^3/y  3 ? >>
Your equation is correct but it does not allow you to solve explicitly for y. What you have to do is treat the "xcontaining" term as if it were a constant in the quadratic equation:
y^2 + 3y x^3 = 0
Then use the equation for the root of quadratic equations:
y = [6 +/ sqrt (9 + 4x^3)]/2
The second question can be handled similarly.
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