- #1
zebra1707
- 107
- 0
Homework Statement
By substituting y for 9x^2 solve 81x^4 - 63x^2 + 10 = 0
Homework Equations
The Attempt at a Solution
My attempt at a solution is:
y^2 - 7y + 10
(y-2)(y-5)
therefore y = 2 y = 5 Can someone double check this?
Cheers