5y^2-24y-28=0

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Solution for 5y^2-24y-28=0 equation:


Simplifying
5y2 + -24y + -28 = 0

Reorder the terms:
-28 + -24y + 5y2 = 0

Solving
-28 + -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'.
-5.6 + -4.8y + y2 = 0

Move the constant term to the right:

Add '5.6' to each side of the equation.
-5.6 + -4.8y + 5.6 + y2 = 0 + 5.6

Reorder the terms:
-5.6 + 5.6 + -4.8y + y2 = 0 + 5.6

Combine like terms: -5.6 + 5.6 = 0.0
0.0 + -4.8y + y2 = 0 + 5.6
-4.8y + y2 = 0 + 5.6

Combine like terms: 0 + 5.6 = 5.6
-4.8y + y2 = 5.6

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 = 5.6 + 5.76

Reorder the terms:
5.76 + -4.8y + y2 = 5.6 + 5.76

Combine like terms: 5.6 + 5.76 = 11.36
5.76 + -4.8y + y2 = 11.36

Factor a perfect square on the left side:
(y + -2.4)(y + -2.4) = 11.36

Calculate the square root of the right side: 3.370459909

Break this problem into two subproblems by setting 
(y + -2.4) equal to 3.370459909 and -3.370459909.

Subproblem 1

y + -2.4 = 3.370459909 Simplifying y + -2.4 = 3.370459909 Reorder the terms: -2.4 + y = 3.370459909 Solving -2.4 + y = 3.370459909 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 = 3.370459909 + 2.4 Combine like terms: -2.4 + 2.4 = 0.0 0.0 + y = 3.370459909 + 2.4 y = 3.370459909 + 2.4 Combine like terms: 3.370459909 + 2.4 = 5.770459909 y = 5.770459909 Simplifying y = 5.770459909

Subproblem 2

y + -2.4 = -3.370459909 Simplifying y + -2.4 = -3.370459909 Reorder the terms: -2.4 + y = -3.370459909 Solving -2.4 + y = -3.370459909 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 = -3.370459909 + 2.4 Combine like terms: -2.4 + 2.4 = 0.0 0.0 + y = -3.370459909 + 2.4 y = -3.370459909 + 2.4 Combine like terms: -3.370459909 + 2.4 = -0.970459909 y = -0.970459909 Simplifying y = -0.970459909

Solution

The solution to the problem is based on the solutions from the subproblems. y = {5.770459909, -0.970459909}

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