y^2-12y+36=7

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Solution for y^2-12y+36=7 equation:


Simplifying
y2 + -12y + 36 = 7

Reorder the terms:
36 + -12y + y2 = 7

Solving
36 + -12y + y2 = 7

Solving for variable 'y'.

Reorder the terms:
36 + -7 + -12y + y2 = 7 + -7

Combine like terms: 36 + -7 = 29
29 + -12y + y2 = 7 + -7

Combine like terms: 7 + -7 = 0
29 + -12y + y2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-29' to each side of the equation.
29 + -12y + -29 + y2 = 0 + -29

Reorder the terms:
29 + -29 + -12y + y2 = 0 + -29

Combine like terms: 29 + -29 = 0
0 + -12y + y2 = 0 + -29
-12y + y2 = 0 + -29

Combine like terms: 0 + -29 = -29
-12y + y2 = -29

The y term is -12y.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12y + 36 + y2 = -29 + 36

Reorder the terms:
36 + -12y + y2 = -29 + 36

Combine like terms: -29 + 36 = 7
36 + -12y + y2 = 7

Factor a perfect square on the left side:
(y + -6)(y + -6) = 7

Calculate the square root of the right side: 2.645751311

Break this problem into two subproblems by setting 
(y + -6) equal to 2.645751311 and -2.645751311.

Subproblem 1

y + -6 = 2.645751311 Simplifying y + -6 = 2.645751311 Reorder the terms: -6 + y = 2.645751311 Solving -6 + y = 2.645751311 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + y = 2.645751311 + 6 Combine like terms: -6 + 6 = 0 0 + y = 2.645751311 + 6 y = 2.645751311 + 6 Combine like terms: 2.645751311 + 6 = 8.645751311 y = 8.645751311 Simplifying y = 8.645751311

Subproblem 2

y + -6 = -2.645751311 Simplifying y + -6 = -2.645751311 Reorder the terms: -6 + y = -2.645751311 Solving -6 + y = -2.645751311 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + y = -2.645751311 + 6 Combine like terms: -6 + 6 = 0 0 + y = -2.645751311 + 6 y = -2.645751311 + 6 Combine like terms: -2.645751311 + 6 = 3.354248689 y = 3.354248689 Simplifying y = 3.354248689

Solution

The solution to the problem is based on the solutions from the subproblems. y = {8.645751311, 3.354248689}

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