(y^2-86y+45)=0

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Solution for (y^2-86y+45)=0 equation:


Simplifying
(y2 + -86y + 45) = 0

Reorder the terms:
(45 + -86y + y2) = 0

Remove parenthesis around (45 + -86y + y2)
45 + -86y + y2 = 0

Solving
45 + -86y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '-45' to each side of the equation.
45 + -86y + -45 + y2 = 0 + -45

Reorder the terms:
45 + -45 + -86y + y2 = 0 + -45

Combine like terms: 45 + -45 = 0
0 + -86y + y2 = 0 + -45
-86y + y2 = 0 + -45

Combine like terms: 0 + -45 = -45
-86y + y2 = -45

The y term is -86y.  Take half its coefficient (-43).
Square it (1849) and add it to both sides.

Add '1849' to each side of the equation.
-86y + 1849 + y2 = -45 + 1849

Reorder the terms:
1849 + -86y + y2 = -45 + 1849

Combine like terms: -45 + 1849 = 1804
1849 + -86y + y2 = 1804

Factor a perfect square on the left side:
(y + -43)(y + -43) = 1804

Calculate the square root of the right side: 42.473521163

Break this problem into two subproblems by setting 
(y + -43) equal to 42.473521163 and -42.473521163.

Subproblem 1

y + -43 = 42.473521163 Simplifying y + -43 = 42.473521163 Reorder the terms: -43 + y = 42.473521163 Solving -43 + y = 42.473521163 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '43' to each side of the equation. -43 + 43 + y = 42.473521163 + 43 Combine like terms: -43 + 43 = 0 0 + y = 42.473521163 + 43 y = 42.473521163 + 43 Combine like terms: 42.473521163 + 43 = 85.473521163 y = 85.473521163 Simplifying y = 85.473521163

Subproblem 2

y + -43 = -42.473521163 Simplifying y + -43 = -42.473521163 Reorder the terms: -43 + y = -42.473521163 Solving -43 + y = -42.473521163 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '43' to each side of the equation. -43 + 43 + y = -42.473521163 + 43 Combine like terms: -43 + 43 = 0 0 + y = -42.473521163 + 43 y = -42.473521163 + 43 Combine like terms: -42.473521163 + 43 = 0.526478837 y = 0.526478837 Simplifying y = 0.526478837

Solution

The solution to the problem is based on the solutions from the subproblems. y = {85.473521163, 0.526478837}

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