y^2+6y-25=0

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Solution for y^2+6y-25=0 equation:


Simplifying
y2 + 6y + -25 = 0

Reorder the terms:
-25 + 6y + y2 = 0

Solving
-25 + 6y + 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 + 6y + 25 + y2 = 0 + 25

Reorder the terms:
-25 + 25 + 6y + y2 = 0 + 25

Combine like terms: -25 + 25 = 0
0 + 6y + y2 = 0 + 25
6y + y2 = 0 + 25

Combine like terms: 0 + 25 = 25
6y + y2 = 25

The y term is 6y.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6y + 9 + y2 = 25 + 9

Reorder the terms:
9 + 6y + y2 = 25 + 9

Combine like terms: 25 + 9 = 34
9 + 6y + y2 = 34

Factor a perfect square on the left side:
(y + 3)(y + 3) = 34

Calculate the square root of the right side: 5.830951895

Break this problem into two subproblems by setting 
(y + 3) equal to 5.830951895 and -5.830951895.

Subproblem 1

y + 3 = 5.830951895 Simplifying y + 3 = 5.830951895 Reorder the terms: 3 + y = 5.830951895 Solving 3 + y = 5.830951895 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + y = 5.830951895 + -3 Combine like terms: 3 + -3 = 0 0 + y = 5.830951895 + -3 y = 5.830951895 + -3 Combine like terms: 5.830951895 + -3 = 2.830951895 y = 2.830951895 Simplifying y = 2.830951895

Subproblem 2

y + 3 = -5.830951895 Simplifying y + 3 = -5.830951895 Reorder the terms: 3 + y = -5.830951895 Solving 3 + y = -5.830951895 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + y = -5.830951895 + -3 Combine like terms: 3 + -3 = 0 0 + y = -5.830951895 + -3 y = -5.830951895 + -3 Combine like terms: -5.830951895 + -3 = -8.830951895 y = -8.830951895 Simplifying y = -8.830951895

Solution

The solution to the problem is based on the solutions from the subproblems. y = {2.830951895, -8.830951895}

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