y^2+85y+875=0

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Solution for y^2+85y+875=0 equation:


Simplifying
y2 + 85y + 875 = 0

Reorder the terms:
875 + 85y + y2 = 0

Solving
875 + 85y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '-875' to each side of the equation.
875 + 85y + -875 + y2 = 0 + -875

Reorder the terms:
875 + -875 + 85y + y2 = 0 + -875

Combine like terms: 875 + -875 = 0
0 + 85y + y2 = 0 + -875
85y + y2 = 0 + -875

Combine like terms: 0 + -875 = -875
85y + y2 = -875

The y term is 85y.  Take half its coefficient (42.5).
Square it (1806.25) and add it to both sides.

Add '1806.25' to each side of the equation.
85y + 1806.25 + y2 = -875 + 1806.25

Reorder the terms:
1806.25 + 85y + y2 = -875 + 1806.25

Combine like terms: -875 + 1806.25 = 931.25
1806.25 + 85y + y2 = 931.25

Factor a perfect square on the left side:
(y + 42.5)(y + 42.5) = 931.25

Calculate the square root of the right side: 30.516389039

Break this problem into two subproblems by setting 
(y + 42.5) equal to 30.516389039 and -30.516389039.

Subproblem 1

y + 42.5 = 30.516389039 Simplifying y + 42.5 = 30.516389039 Reorder the terms: 42.5 + y = 30.516389039 Solving 42.5 + y = 30.516389039 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-42.5' to each side of the equation. 42.5 + -42.5 + y = 30.516389039 + -42.5 Combine like terms: 42.5 + -42.5 = 0.0 0.0 + y = 30.516389039 + -42.5 y = 30.516389039 + -42.5 Combine like terms: 30.516389039 + -42.5 = -11.983610961 y = -11.983610961 Simplifying y = -11.983610961

Subproblem 2

y + 42.5 = -30.516389039 Simplifying y + 42.5 = -30.516389039 Reorder the terms: 42.5 + y = -30.516389039 Solving 42.5 + y = -30.516389039 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-42.5' to each side of the equation. 42.5 + -42.5 + y = -30.516389039 + -42.5 Combine like terms: 42.5 + -42.5 = 0.0 0.0 + y = -30.516389039 + -42.5 y = -30.516389039 + -42.5 Combine like terms: -30.516389039 + -42.5 = -73.016389039 y = -73.016389039 Simplifying y = -73.016389039

Solution

The solution to the problem is based on the solutions from the subproblems. y = {-11.983610961, -73.016389039}

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