y^2+30y+25=0

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Solution for y^2+30y+25=0 equation:


Simplifying
y2 + 30y + 25 = 0

Reorder the terms:
25 + 30y + y2 = 0

Solving
25 + 30y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '-25' to each side of the equation.
25 + 30y + -25 + y2 = 0 + -25

Reorder the terms:
25 + -25 + 30y + y2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + 30y + y2 = 0 + -25
30y + y2 = 0 + -25

Combine like terms: 0 + -25 = -25
30y + y2 = -25

The y term is 30y.  Take half its coefficient (15).
Square it (225) and add it to both sides.

Add '225' to each side of the equation.
30y + 225 + y2 = -25 + 225

Reorder the terms:
225 + 30y + y2 = -25 + 225

Combine like terms: -25 + 225 = 200
225 + 30y + y2 = 200

Factor a perfect square on the left side:
(y + 15)(y + 15) = 200

Calculate the square root of the right side: 14.142135624

Break this problem into two subproblems by setting 
(y + 15) equal to 14.142135624 and -14.142135624.

Subproblem 1

y + 15 = 14.142135624 Simplifying y + 15 = 14.142135624 Reorder the terms: 15 + y = 14.142135624 Solving 15 + y = 14.142135624 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + y = 14.142135624 + -15 Combine like terms: 15 + -15 = 0 0 + y = 14.142135624 + -15 y = 14.142135624 + -15 Combine like terms: 14.142135624 + -15 = -0.857864376 y = -0.857864376 Simplifying y = -0.857864376

Subproblem 2

y + 15 = -14.142135624 Simplifying y + 15 = -14.142135624 Reorder the terms: 15 + y = -14.142135624 Solving 15 + y = -14.142135624 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + y = -14.142135624 + -15 Combine like terms: 15 + -15 = 0 0 + y = -14.142135624 + -15 y = -14.142135624 + -15 Combine like terms: -14.142135624 + -15 = -29.142135624 y = -29.142135624 Simplifying y = -29.142135624

Solution

The solution to the problem is based on the solutions from the subproblems. y = {-0.857864376, -29.142135624}

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