5.75y+y^2=7.5

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Solution for 5.75y+y^2=7.5 equation:


Simplifying
5.75y + y2 = 7.5

Solving
5.75y + y2 = 7.5

Solving for variable 'y'.

Reorder the terms:
-7.5 + 5.75y + y2 = 7.5 + -7.5

Combine like terms: 7.5 + -7.5 = 0.0
-7.5 + 5.75y + y2 = 0.0

Begin completing the square.

Move the constant term to the right:

Add '7.5' to each side of the equation.
-7.5 + 5.75y + 7.5 + y2 = 0.0 + 7.5

Reorder the terms:
-7.5 + 7.5 + 5.75y + y2 = 0.0 + 7.5

Combine like terms: -7.5 + 7.5 = 0.0
0.0 + 5.75y + y2 = 0.0 + 7.5
5.75y + y2 = 0.0 + 7.5

Combine like terms: 0.0 + 7.5 = 7.5
5.75y + y2 = 7.5

The y term is 5.75y.  Take half its coefficient (2.875).
Square it (8.265625) and add it to both sides.

Add '8.265625' to each side of the equation.
5.75y + 8.265625 + y2 = 7.5 + 8.265625

Reorder the terms:
8.265625 + 5.75y + y2 = 7.5 + 8.265625

Combine like terms: 7.5 + 8.265625 = 15.765625
8.265625 + 5.75y + y2 = 15.765625

Factor a perfect square on the left side:
(y + 2.875)(y + 2.875) = 15.765625

Calculate the square root of the right side: 3.970595044

Break this problem into two subproblems by setting 
(y + 2.875) equal to 3.970595044 and -3.970595044.

Subproblem 1

y + 2.875 = 3.970595044 Simplifying y + 2.875 = 3.970595044 Reorder the terms: 2.875 + y = 3.970595044 Solving 2.875 + y = 3.970595044 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.875' to each side of the equation. 2.875 + -2.875 + y = 3.970595044 + -2.875 Combine like terms: 2.875 + -2.875 = 0.000 0.000 + y = 3.970595044 + -2.875 y = 3.970595044 + -2.875 Combine like terms: 3.970595044 + -2.875 = 1.095595044 y = 1.095595044 Simplifying y = 1.095595044

Subproblem 2

y + 2.875 = -3.970595044 Simplifying y + 2.875 = -3.970595044 Reorder the terms: 2.875 + y = -3.970595044 Solving 2.875 + y = -3.970595044 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.875' to each side of the equation. 2.875 + -2.875 + y = -3.970595044 + -2.875 Combine like terms: 2.875 + -2.875 = 0.000 0.000 + y = -3.970595044 + -2.875 y = -3.970595044 + -2.875 Combine like terms: -3.970595044 + -2.875 = -6.845595044 y = -6.845595044 Simplifying y = -6.845595044

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.095595044, -6.845595044}

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