4y^2-22y+25=0

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Solution for 4y^2-22y+25=0 equation:


Simplifying
4y2 + -22y + 25 = 0

Reorder the terms:
25 + -22y + 4y2 = 0

Solving
25 + -22y + 4y2 = 0

Solving for variable 'y'.

Begin completing the square.  Divide all terms by
4 the coefficient of the squared term: 

Divide each side by '4'.
6.25 + -5.5y + y2 = 0

Move the constant term to the right:

Add '-6.25' to each side of the equation.
6.25 + -5.5y + -6.25 + y2 = 0 + -6.25

Reorder the terms:
6.25 + -6.25 + -5.5y + y2 = 0 + -6.25

Combine like terms: 6.25 + -6.25 = 0.00
0.00 + -5.5y + y2 = 0 + -6.25
-5.5y + y2 = 0 + -6.25

Combine like terms: 0 + -6.25 = -6.25
-5.5y + y2 = -6.25

The y term is -5.5y.  Take half its coefficient (-2.75).
Square it (7.5625) and add it to both sides.

Add '7.5625' to each side of the equation.
-5.5y + 7.5625 + y2 = -6.25 + 7.5625

Reorder the terms:
7.5625 + -5.5y + y2 = -6.25 + 7.5625

Combine like terms: -6.25 + 7.5625 = 1.3125
7.5625 + -5.5y + y2 = 1.3125

Factor a perfect square on the left side:
(y + -2.75)(y + -2.75) = 1.3125

Calculate the square root of the right side: 1.145643924

Break this problem into two subproblems by setting 
(y + -2.75) equal to 1.145643924 and -1.145643924.

Subproblem 1

y + -2.75 = 1.145643924 Simplifying y + -2.75 = 1.145643924 Reorder the terms: -2.75 + y = 1.145643924 Solving -2.75 + y = 1.145643924 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.75' to each side of the equation. -2.75 + 2.75 + y = 1.145643924 + 2.75 Combine like terms: -2.75 + 2.75 = 0.00 0.00 + y = 1.145643924 + 2.75 y = 1.145643924 + 2.75 Combine like terms: 1.145643924 + 2.75 = 3.895643924 y = 3.895643924 Simplifying y = 3.895643924

Subproblem 2

y + -2.75 = -1.145643924 Simplifying y + -2.75 = -1.145643924 Reorder the terms: -2.75 + y = -1.145643924 Solving -2.75 + y = -1.145643924 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.75' to each side of the equation. -2.75 + 2.75 + y = -1.145643924 + 2.75 Combine like terms: -2.75 + 2.75 = 0.00 0.00 + y = -1.145643924 + 2.75 y = -1.145643924 + 2.75 Combine like terms: -1.145643924 + 2.75 = 1.604356076 y = 1.604356076 Simplifying y = 1.604356076

Solution

The solution to the problem is based on the solutions from the subproblems. y = {3.895643924, 1.604356076}

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