# Math Help - Find All Real Solutions

1. ## Find All Real Solutions

Find all real sollutions of the equation exactly.y^4 - 7y^2 + 6 = 0

2. To solve this problem, you should use a dirty trick: "see" this problem as a quadratic in some variable. Do you follow me?

3. Originally Posted by Ackbeet
To solve this problem, you should use a dirty trick: "see" this problem as a quadratic in some variable. Do you follow me?
I don't know what you mean. Can you show me what to do? Can you show me the steps?

4. Let $y^2 = Y$.

What happens to the equation?

5. Originally Posted by Prove It
Let $y^2 = Y$.

What happens to the equation?
What quadratic do you get? Remember that $y^4 = (y^2)^2$.