SOLUTION: To solve the equation y^4 + y^2 – 2 = 0, the best choice for u to obtain an equation in quadratic form is _______.

Algebra ->  Radicals -> SOLUTION: To solve the equation y^4 + y^2 – 2 = 0, the best choice for u to obtain an equation in quadratic form is _______.       Log On


   

Question 1102252: To solve the equation y^4 + y^2 – 2 = 0, the best choice for u to obtain an equation in quadratic form is _______.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
u=y%5E2

u%5E2%2Bu-2=0

%28u-1%29%28u%2B2%29=0

system%28y%5E2=1%2Cor%2Cy%5E2=-2%29, and solve each of these.