y^2+3y-476=0

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Solution for y^2+3y-476=0 equation:


Simplifying
y2 + 3y + -476 = 0

Reorder the terms:
-476 + 3y + y2 = 0

Solving
-476 + 3y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '476' to each side of the equation.
-476 + 3y + 476 + y2 = 0 + 476

Reorder the terms:
-476 + 476 + 3y + y2 = 0 + 476

Combine like terms: -476 + 476 = 0
0 + 3y + y2 = 0 + 476
3y + y2 = 0 + 476

Combine like terms: 0 + 476 = 476
3y + y2 = 476

The y term is 3y.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3y + 2.25 + y2 = 476 + 2.25

Reorder the terms:
2.25 + 3y + y2 = 476 + 2.25

Combine like terms: 476 + 2.25 = 478.25
2.25 + 3y + y2 = 478.25

Factor a perfect square on the left side:
(y + 1.5)(y + 1.5) = 478.25

Calculate the square root of the right side: 21.868927729

Break this problem into two subproblems by setting 
(y + 1.5) equal to 21.868927729 and -21.868927729.

Subproblem 1

y + 1.5 = 21.868927729 Simplifying y + 1.5 = 21.868927729 Reorder the terms: 1.5 + y = 21.868927729 Solving 1.5 + y = 21.868927729 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + y = 21.868927729 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + y = 21.868927729 + -1.5 y = 21.868927729 + -1.5 Combine like terms: 21.868927729 + -1.5 = 20.368927729 y = 20.368927729 Simplifying y = 20.368927729

Subproblem 2

y + 1.5 = -21.868927729 Simplifying y + 1.5 = -21.868927729 Reorder the terms: 1.5 + y = -21.868927729 Solving 1.5 + y = -21.868927729 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + y = -21.868927729 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + y = -21.868927729 + -1.5 y = -21.868927729 + -1.5 Combine like terms: -21.868927729 + -1.5 = -23.368927729 y = -23.368927729 Simplifying y = -23.368927729

Solution

The solution to the problem is based on the solutions from the subproblems. y = {20.368927729, -23.368927729}

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