SOLUTION: solve for y: 9y^4 - 4y^2 = 0

Algebra.Com
Question 152626: solve for y:
9y^4 - 4y^2 = 0

Answer by jim_thompson5910(35256)   (Show Source): You can put this solution on YOUR website!
Start with the given equation.


Factor out


Factor to get



Now set each factor equal to zero:


, or


Now solve for y for each equation:


, or


So the solutions are (with a multiplicity of 2), or

RELATED QUESTIONS

3[4(y+2)-(y+5)]=3(3y+1) 3[4y+8-y+5]=9y+3 3[3y+13]=9y+3 9y+39=9y+3 9y+36=9y 36=0 no... (answered by Tutor77)
4/9y^2 + 1 = 0 solve... (answered by Fombitz)
Use the quadratic formula to solve the equation for x in terms of y.? 2x^2 + 9xy -5 -... (answered by Fombitz)
How to solve for X and Y. The problem is as follows... (answered by MathLover1)
Solve for y: {{{ 4y^2 + 20y + 25 = 0... (answered by ellygirl5969)
2. solve y^4-4y^2+4=0(hint: set x=y^2 solve for x, then solve for y after finding... (answered by jim_thompson5910)
Quesion : Solve for y: y^4-4y^2=40y-10y^3 y= or y= or y= or y=... (answered by Fermat)
Solve for y 4/9y -5 = 3 3/7y -4= 2 (answered by mukhopadhyay)
solve 4x+9y+8z=14 x+2y+5z=0... (answered by amfagge92,MathTherapy)