4y+y^2-247=0

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Solution for 4y+y^2-247=0 equation:


Simplifying
4y + y2 + -247 = 0

Reorder the terms:
-247 + 4y + y2 = 0

Solving
-247 + 4y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '247' to each side of the equation.
-247 + 4y + 247 + y2 = 0 + 247

Reorder the terms:
-247 + 247 + 4y + y2 = 0 + 247

Combine like terms: -247 + 247 = 0
0 + 4y + y2 = 0 + 247
4y + y2 = 0 + 247

Combine like terms: 0 + 247 = 247
4y + y2 = 247

The y term is 4y.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4y + 4 + y2 = 247 + 4

Reorder the terms:
4 + 4y + y2 = 247 + 4

Combine like terms: 247 + 4 = 251
4 + 4y + y2 = 251

Factor a perfect square on the left side:
(y + 2)(y + 2) = 251

Calculate the square root of the right side: 15.842979518

Break this problem into two subproblems by setting 
(y + 2) equal to 15.842979518 and -15.842979518.

Subproblem 1

y + 2 = 15.842979518 Simplifying y + 2 = 15.842979518 Reorder the terms: 2 + y = 15.842979518 Solving 2 + y = 15.842979518 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + y = 15.842979518 + -2 Combine like terms: 2 + -2 = 0 0 + y = 15.842979518 + -2 y = 15.842979518 + -2 Combine like terms: 15.842979518 + -2 = 13.842979518 y = 13.842979518 Simplifying y = 13.842979518

Subproblem 2

y + 2 = -15.842979518 Simplifying y + 2 = -15.842979518 Reorder the terms: 2 + y = -15.842979518 Solving 2 + y = -15.842979518 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + y = -15.842979518 + -2 Combine like terms: 2 + -2 = 0 0 + y = -15.842979518 + -2 y = -15.842979518 + -2 Combine like terms: -15.842979518 + -2 = -17.842979518 y = -17.842979518 Simplifying y = -17.842979518

Solution

The solution to the problem is based on the solutions from the subproblems. y = {13.842979518, -17.842979518}

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