y^2+70y+75=0

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Solution for y^2+70y+75=0 equation:


Simplifying
y2 + 70y + 75 = 0

Reorder the terms:
75 + 70y + y2 = 0

Solving
75 + 70y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '-75' to each side of the equation.
75 + 70y + -75 + y2 = 0 + -75

Reorder the terms:
75 + -75 + 70y + y2 = 0 + -75

Combine like terms: 75 + -75 = 0
0 + 70y + y2 = 0 + -75
70y + y2 = 0 + -75

Combine like terms: 0 + -75 = -75
70y + y2 = -75

The y term is 70y.  Take half its coefficient (35).
Square it (1225) and add it to both sides.

Add '1225' to each side of the equation.
70y + 1225 + y2 = -75 + 1225

Reorder the terms:
1225 + 70y + y2 = -75 + 1225

Combine like terms: -75 + 1225 = 1150
1225 + 70y + y2 = 1150

Factor a perfect square on the left side:
(y + 35)(y + 35) = 1150

Calculate the square root of the right side: 33.911649916

Break this problem into two subproblems by setting 
(y + 35) equal to 33.911649916 and -33.911649916.

Subproblem 1

y + 35 = 33.911649916 Simplifying y + 35 = 33.911649916 Reorder the terms: 35 + y = 33.911649916 Solving 35 + y = 33.911649916 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-35' to each side of the equation. 35 + -35 + y = 33.911649916 + -35 Combine like terms: 35 + -35 = 0 0 + y = 33.911649916 + -35 y = 33.911649916 + -35 Combine like terms: 33.911649916 + -35 = -1.088350084 y = -1.088350084 Simplifying y = -1.088350084

Subproblem 2

y + 35 = -33.911649916 Simplifying y + 35 = -33.911649916 Reorder the terms: 35 + y = -33.911649916 Solving 35 + y = -33.911649916 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-35' to each side of the equation. 35 + -35 + y = -33.911649916 + -35 Combine like terms: 35 + -35 = 0 0 + y = -33.911649916 + -35 y = -33.911649916 + -35 Combine like terms: -33.911649916 + -35 = -68.911649916 y = -68.911649916 Simplifying y = -68.911649916

Solution

The solution to the problem is based on the solutions from the subproblems. y = {-1.088350084, -68.911649916}

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