Subtract from .

Subtract from .

Divide each term in by .

Cancel the common factor of .

Divide by .

Take the 4th root of both sides of the equation to eliminate the exponent on the left side.

First, use the positive value of the to find the first solution.

Next, use the negative value of the to find the second solution.

The complete solution is the result of both the positive and negative portions of the solution.

Solve for y 0.2y^4-1.3y^4=4.9-1.4