y*y=-2(2y-35)

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Solution for y*y=-2(2y-35) equation:


Simplifying
y * y = -2(2y + -35)

Multiply y * y
y2 = -2(2y + -35)

Reorder the terms:
y2 = -2(-35 + 2y)
y2 = (-35 * -2 + 2y * -2)
y2 = (70 + -4y)

Solving
y2 = 70 + -4y

Solving for variable 'y'.

Reorder the terms:
-70 + 4y + y2 = 70 + -4y + -70 + 4y

Reorder the terms:
-70 + 4y + y2 = 70 + -70 + -4y + 4y

Combine like terms: 70 + -70 = 0
-70 + 4y + y2 = 0 + -4y + 4y
-70 + 4y + y2 = -4y + 4y

Combine like terms: -4y + 4y = 0
-70 + 4y + y2 = 0

Begin completing the square.

Move the constant term to the right:

Add '70' to each side of the equation.
-70 + 4y + 70 + y2 = 0 + 70

Reorder the terms:
-70 + 70 + 4y + y2 = 0 + 70

Combine like terms: -70 + 70 = 0
0 + 4y + y2 = 0 + 70
4y + y2 = 0 + 70

Combine like terms: 0 + 70 = 70
4y + y2 = 70

The y term is 4y.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4y + 4 + y2 = 70 + 4

Reorder the terms:
4 + 4y + y2 = 70 + 4

Combine like terms: 70 + 4 = 74
4 + 4y + y2 = 74

Factor a perfect square on the left side:
(y + 2)(y + 2) = 74

Calculate the square root of the right side: 8.602325267

Break this problem into two subproblems by setting 
(y + 2) equal to 8.602325267 and -8.602325267.

Subproblem 1

y + 2 = 8.602325267 Simplifying y + 2 = 8.602325267 Reorder the terms: 2 + y = 8.602325267 Solving 2 + y = 8.602325267 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + y = 8.602325267 + -2 Combine like terms: 2 + -2 = 0 0 + y = 8.602325267 + -2 y = 8.602325267 + -2 Combine like terms: 8.602325267 + -2 = 6.602325267 y = 6.602325267 Simplifying y = 6.602325267

Subproblem 2

y + 2 = -8.602325267 Simplifying y + 2 = -8.602325267 Reorder the terms: 2 + y = -8.602325267 Solving 2 + y = -8.602325267 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + y = -8.602325267 + -2 Combine like terms: 2 + -2 = 0 0 + y = -8.602325267 + -2 y = -8.602325267 + -2 Combine like terms: -8.602325267 + -2 = -10.602325267 y = -10.602325267 Simplifying y = -10.602325267

Solution

The solution to the problem is based on the solutions from the subproblems. y = {6.602325267, -10.602325267}

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