13y^2+-8y+5=48

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Solution for 13y^2+-8y+5=48 equation:


Simplifying
13y2 + -8y + 5 = 48

Reorder the terms:
5 + -8y + 13y2 = 48

Solving
5 + -8y + 13y2 = 48

Solving for variable 'y'.

Reorder the terms:
5 + -48 + -8y + 13y2 = 48 + -48

Combine like terms: 5 + -48 = -43
-43 + -8y + 13y2 = 48 + -48

Combine like terms: 48 + -48 = 0
-43 + -8y + 13y2 = 0

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

Divide each side by '13'.
-3.307692308 + -0.6153846154y + y2 = 0

Move the constant term to the right:

Add '3.307692308' to each side of the equation.
-3.307692308 + -0.6153846154y + 3.307692308 + y2 = 0 + 3.307692308

Reorder the terms:
-3.307692308 + 3.307692308 + -0.6153846154y + y2 = 0 + 3.307692308

Combine like terms: -3.307692308 + 3.307692308 = 0.000000000
0.000000000 + -0.6153846154y + y2 = 0 + 3.307692308
-0.6153846154y + y2 = 0 + 3.307692308

Combine like terms: 0 + 3.307692308 = 3.307692308
-0.6153846154y + y2 = 3.307692308

The y term is -0.6153846154y.  Take half its coefficient (-0.3076923077).
Square it (0.09467455622) and add it to both sides.

Add '0.09467455622' to each side of the equation.
-0.6153846154y + 0.09467455622 + y2 = 3.307692308 + 0.09467455622

Reorder the terms:
0.09467455622 + -0.6153846154y + y2 = 3.307692308 + 0.09467455622

Combine like terms: 3.307692308 + 0.09467455622 = 3.40236686422
0.09467455622 + -0.6153846154y + y2 = 3.40236686422

Factor a perfect square on the left side:
(y + -0.3076923077)(y + -0.3076923077) = 3.40236686422

Calculate the square root of the right side: 1.844550586

Break this problem into two subproblems by setting 
(y + -0.3076923077) equal to 1.844550586 and -1.844550586.

Subproblem 1

y + -0.3076923077 = 1.844550586 Simplifying y + -0.3076923077 = 1.844550586 Reorder the terms: -0.3076923077 + y = 1.844550586 Solving -0.3076923077 + y = 1.844550586 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.3076923077' to each side of the equation. -0.3076923077 + 0.3076923077 + y = 1.844550586 + 0.3076923077 Combine like terms: -0.3076923077 + 0.3076923077 = 0.0000000000 0.0000000000 + y = 1.844550586 + 0.3076923077 y = 1.844550586 + 0.3076923077 Combine like terms: 1.844550586 + 0.3076923077 = 2.1522428937 y = 2.1522428937 Simplifying y = 2.1522428937

Subproblem 2

y + -0.3076923077 = -1.844550586 Simplifying y + -0.3076923077 = -1.844550586 Reorder the terms: -0.3076923077 + y = -1.844550586 Solving -0.3076923077 + y = -1.844550586 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.3076923077' to each side of the equation. -0.3076923077 + 0.3076923077 + y = -1.844550586 + 0.3076923077 Combine like terms: -0.3076923077 + 0.3076923077 = 0.0000000000 0.0000000000 + y = -1.844550586 + 0.3076923077 y = -1.844550586 + 0.3076923077 Combine like terms: -1.844550586 + 0.3076923077 = -1.5368582783 y = -1.5368582783 Simplifying y = -1.5368582783

Solution

The solution to the problem is based on the solutions from the subproblems. y = {2.1522428937, -1.5368582783}

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