42y+6=14+2y-25y^2

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Solution for 42y+6=14+2y-25y^2 equation:


Simplifying
42y + 6 = 14 + 2y + -25y2

Reorder the terms:
6 + 42y = 14 + 2y + -25y2

Solving
6 + 42y = 14 + 2y + -25y2

Solving for variable 'y'.

Reorder the terms:
6 + -14 + 42y + -2y + 25y2 = 14 + 2y + -25y2 + -14 + -2y + 25y2

Combine like terms: 6 + -14 = -8
-8 + 42y + -2y + 25y2 = 14 + 2y + -25y2 + -14 + -2y + 25y2

Combine like terms: 42y + -2y = 40y
-8 + 40y + 25y2 = 14 + 2y + -25y2 + -14 + -2y + 25y2

Reorder the terms:
-8 + 40y + 25y2 = 14 + -14 + 2y + -2y + -25y2 + 25y2

Combine like terms: 14 + -14 = 0
-8 + 40y + 25y2 = 0 + 2y + -2y + -25y2 + 25y2
-8 + 40y + 25y2 = 2y + -2y + -25y2 + 25y2

Combine like terms: 2y + -2y = 0
-8 + 40y + 25y2 = 0 + -25y2 + 25y2
-8 + 40y + 25y2 = -25y2 + 25y2

Combine like terms: -25y2 + 25y2 = 0
-8 + 40y + 25y2 = 0

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

Divide each side by '25'.
-0.32 + 1.6y + y2 = 0

Move the constant term to the right:

Add '0.32' to each side of the equation.
-0.32 + 1.6y + 0.32 + y2 = 0 + 0.32

Reorder the terms:
-0.32 + 0.32 + 1.6y + y2 = 0 + 0.32

Combine like terms: -0.32 + 0.32 = 0.00
0.00 + 1.6y + y2 = 0 + 0.32
1.6y + y2 = 0 + 0.32

Combine like terms: 0 + 0.32 = 0.32
1.6y + y2 = 0.32

The y term is 1.6y.  Take half its coefficient (0.8).
Square it (0.64) and add it to both sides.

Add '0.64' to each side of the equation.
1.6y + 0.64 + y2 = 0.32 + 0.64

Reorder the terms:
0.64 + 1.6y + y2 = 0.32 + 0.64

Combine like terms: 0.32 + 0.64 = 0.96
0.64 + 1.6y + y2 = 0.96

Factor a perfect square on the left side:
(y + 0.8)(y + 0.8) = 0.96

Calculate the square root of the right side: 0.979795897

Break this problem into two subproblems by setting 
(y + 0.8) equal to 0.979795897 and -0.979795897.

Subproblem 1

y + 0.8 = 0.979795897 Simplifying y + 0.8 = 0.979795897 Reorder the terms: 0.8 + y = 0.979795897 Solving 0.8 + y = 0.979795897 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.8' to each side of the equation. 0.8 + -0.8 + y = 0.979795897 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + y = 0.979795897 + -0.8 y = 0.979795897 + -0.8 Combine like terms: 0.979795897 + -0.8 = 0.179795897 y = 0.179795897 Simplifying y = 0.179795897

Subproblem 2

y + 0.8 = -0.979795897 Simplifying y + 0.8 = -0.979795897 Reorder the terms: 0.8 + y = -0.979795897 Solving 0.8 + y = -0.979795897 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.8' to each side of the equation. 0.8 + -0.8 + y = -0.979795897 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + y = -0.979795897 + -0.8 y = -0.979795897 + -0.8 Combine like terms: -0.979795897 + -0.8 = -1.779795897 y = -1.779795897 Simplifying y = -1.779795897

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.179795897, -1.779795897}

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