y^2-14y=-46

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Solution for y^2-14y=-46 equation:


Simplifying
y2 + -14y = -46

Reorder the terms:
-14y + y2 = -46

Solving
-14y + y2 = -46

Solving for variable 'y'.

Reorder the terms:
46 + -14y + y2 = -46 + 46

Combine like terms: -46 + 46 = 0
46 + -14y + y2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-46' to each side of the equation.
46 + -14y + -46 + y2 = 0 + -46

Reorder the terms:
46 + -46 + -14y + y2 = 0 + -46

Combine like terms: 46 + -46 = 0
0 + -14y + y2 = 0 + -46
-14y + y2 = 0 + -46

Combine like terms: 0 + -46 = -46
-14y + y2 = -46

The y term is -14y.  Take half its coefficient (-7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
-14y + 49 + y2 = -46 + 49

Reorder the terms:
49 + -14y + y2 = -46 + 49

Combine like terms: -46 + 49 = 3
49 + -14y + y2 = 3

Factor a perfect square on the left side:
(y + -7)(y + -7) = 3

Calculate the square root of the right side: 1.732050808

Break this problem into two subproblems by setting 
(y + -7) equal to 1.732050808 and -1.732050808.

Subproblem 1

y + -7 = 1.732050808 Simplifying y + -7 = 1.732050808 Reorder the terms: -7 + y = 1.732050808 Solving -7 + y = 1.732050808 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + y = 1.732050808 + 7 Combine like terms: -7 + 7 = 0 0 + y = 1.732050808 + 7 y = 1.732050808 + 7 Combine like terms: 1.732050808 + 7 = 8.732050808 y = 8.732050808 Simplifying y = 8.732050808

Subproblem 2

y + -7 = -1.732050808 Simplifying y + -7 = -1.732050808 Reorder the terms: -7 + y = -1.732050808 Solving -7 + y = -1.732050808 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + y = -1.732050808 + 7 Combine like terms: -7 + 7 = 0 0 + y = -1.732050808 + 7 y = -1.732050808 + 7 Combine like terms: -1.732050808 + 7 = 5.267949192 y = 5.267949192 Simplifying y = 5.267949192

Solution

The solution to the problem is based on the solutions from the subproblems. y = {8.732050808, 5.267949192}

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