5y^2-24y+9=0

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Solution for 5y^2-24y+9=0 equation:


Simplifying
5y2 + -24y + 9 = 0

Reorder the terms:
9 + -24y + 5y2 = 0

Solving
9 + -24y + 5y2 = 0

Solving for variable 'y'.

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

Divide each side by '5'.
1.8 + -4.8y + y2 = 0

Move the constant term to the right:

Add '-1.8' to each side of the equation.
1.8 + -4.8y + -1.8 + y2 = 0 + -1.8

Reorder the terms:
1.8 + -1.8 + -4.8y + y2 = 0 + -1.8

Combine like terms: 1.8 + -1.8 = 0.0
0.0 + -4.8y + y2 = 0 + -1.8
-4.8y + y2 = 0 + -1.8

Combine like terms: 0 + -1.8 = -1.8
-4.8y + y2 = -1.8

The y term is -4.8y.  Take half its coefficient (-2.4).
Square it (5.76) and add it to both sides.

Add '5.76' to each side of the equation.
-4.8y + 5.76 + y2 = -1.8 + 5.76

Reorder the terms:
5.76 + -4.8y + y2 = -1.8 + 5.76

Combine like terms: -1.8 + 5.76 = 3.96
5.76 + -4.8y + y2 = 3.96

Factor a perfect square on the left side:
(y + -2.4)(y + -2.4) = 3.96

Calculate the square root of the right side: 1.989974874

Break this problem into two subproblems by setting 
(y + -2.4) equal to 1.989974874 and -1.989974874.

Subproblem 1

y + -2.4 = 1.989974874 Simplifying y + -2.4 = 1.989974874 Reorder the terms: -2.4 + y = 1.989974874 Solving -2.4 + y = 1.989974874 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.4' to each side of the equation. -2.4 + 2.4 + y = 1.989974874 + 2.4 Combine like terms: -2.4 + 2.4 = 0.0 0.0 + y = 1.989974874 + 2.4 y = 1.989974874 + 2.4 Combine like terms: 1.989974874 + 2.4 = 4.389974874 y = 4.389974874 Simplifying y = 4.389974874

Subproblem 2

y + -2.4 = -1.989974874 Simplifying y + -2.4 = -1.989974874 Reorder the terms: -2.4 + y = -1.989974874 Solving -2.4 + y = -1.989974874 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.4' to each side of the equation. -2.4 + 2.4 + y = -1.989974874 + 2.4 Combine like terms: -2.4 + 2.4 = 0.0 0.0 + y = -1.989974874 + 2.4 y = -1.989974874 + 2.4 Combine like terms: -1.989974874 + 2.4 = 0.410025126 y = 0.410025126 Simplifying y = 0.410025126

Solution

The solution to the problem is based on the solutions from the subproblems. y = {4.389974874, 0.410025126}

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