y^2+2.25=-3y

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Solution for y^2+2.25=-3y equation:


Simplifying
y2 + 2.25 = -3y

Reorder the terms:
2.25 + y2 = -3y

Solving
2.25 + y2 = -3y

Solving for variable 'y'.

Reorder the terms:
2.25 + 3y + y2 = -3y + 3y

Combine like terms: -3y + 3y = 0
2.25 + 3y + y2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-2.25' to each side of the equation.
2.25 + 3y + -2.25 + y2 = 0 + -2.25

Reorder the terms:
2.25 + -2.25 + 3y + y2 = 0 + -2.25

Combine like terms: 2.25 + -2.25 = 0.00
0.00 + 3y + y2 = 0 + -2.25
3y + y2 = 0 + -2.25

Combine like terms: 0 + -2.25 = -2.25
3y + y2 = -2.25

The y term is 3y.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3y + 2.25 + y2 = -2.25 + 2.25

Reorder the terms:
2.25 + 3y + y2 = -2.25 + 2.25

Combine like terms: -2.25 + 2.25 = 0.00
2.25 + 3y + y2 = 0.00

Factor a perfect square on the left side:
(y + 1.5)(y + 1.5) = 0.00

Calculate the square root of the right side: 0.00

Break this problem into two subproblems by setting 
(y + 1.5) equal to 0.00 and 0.00.

Subproblem 1

y + 1.5 = 0.00 Simplifying y + 1.5 = 0.00 Reorder the terms: 1.5 + y = 0.00 Solving 1.5 + y = 0.00 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + y = 0.00 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + y = 0.00 + -1.5 y = 0.00 + -1.5 Combine like terms: 0.00 + -1.5 = -1.5 y = -1.5 Simplifying y = -1.5

Subproblem 2

y + 1.5 = 0.00 Simplifying y + 1.5 = 0.00 Reorder the terms: 1.5 + y = 0.00 Solving 1.5 + y = 0.00 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + y = 0.00 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + y = 0.00 + -1.5 y = 0.00 + -1.5 Combine like terms: 0.00 + -1.5 = -1.5 y = -1.5 Simplifying y = -1.5

Solution

The solution to the problem is based on the solutions from the subproblems. y = {-1.5, -1.5}

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