0=(y^2-7y-22)

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Solution for 0=(y^2-7y-22) equation:


Simplifying
0 = (y2 + -7y + -22)

Reorder the terms:
0 = (-22 + -7y + y2)

Remove parenthesis around (-22 + -7y + y2)
0 = -22 + -7y + y2

Solving
0 = -22 + -7y + y2

Solving for variable 'y'.

Combine like terms: 0 + 22 = 22
22 + 7y + -1y2 = -22 + -7y + y2 + 22 + 7y + -1y2

Reorder the terms:
22 + 7y + -1y2 = -22 + 22 + -7y + 7y + y2 + -1y2

Combine like terms: -22 + 22 = 0
22 + 7y + -1y2 = 0 + -7y + 7y + y2 + -1y2
22 + 7y + -1y2 = -7y + 7y + y2 + -1y2

Combine like terms: -7y + 7y = 0
22 + 7y + -1y2 = 0 + y2 + -1y2
22 + 7y + -1y2 = y2 + -1y2

Combine like terms: y2 + -1y2 = 0
22 + 7y + -1y2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-22 + -7y + y2 = 0

Move the constant term to the right:

Add '22' to each side of the equation.
-22 + -7y + 22 + y2 = 0 + 22

Reorder the terms:
-22 + 22 + -7y + y2 = 0 + 22

Combine like terms: -22 + 22 = 0
0 + -7y + y2 = 0 + 22
-7y + y2 = 0 + 22

Combine like terms: 0 + 22 = 22
-7y + y2 = 22

The y term is -7y.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7y + 12.25 + y2 = 22 + 12.25

Reorder the terms:
12.25 + -7y + y2 = 22 + 12.25

Combine like terms: 22 + 12.25 = 34.25
12.25 + -7y + y2 = 34.25

Factor a perfect square on the left side:
(y + -3.5)(y + -3.5) = 34.25

Calculate the square root of the right side: 5.852349955

Break this problem into two subproblems by setting 
(y + -3.5) equal to 5.852349955 and -5.852349955.

Subproblem 1

y + -3.5 = 5.852349955 Simplifying y + -3.5 = 5.852349955 Reorder the terms: -3.5 + y = 5.852349955 Solving -3.5 + y = 5.852349955 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + y = 5.852349955 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + y = 5.852349955 + 3.5 y = 5.852349955 + 3.5 Combine like terms: 5.852349955 + 3.5 = 9.352349955 y = 9.352349955 Simplifying y = 9.352349955

Subproblem 2

y + -3.5 = -5.852349955 Simplifying y + -3.5 = -5.852349955 Reorder the terms: -3.5 + y = -5.852349955 Solving -3.5 + y = -5.852349955 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + y = -5.852349955 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + y = -5.852349955 + 3.5 y = -5.852349955 + 3.5 Combine like terms: -5.852349955 + 3.5 = -2.352349955 y = -2.352349955 Simplifying y = -2.352349955

Solution

The solution to the problem is based on the solutions from the subproblems. y = {9.352349955, -2.352349955}

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