2y^2+2y-13=0

Simple and best practice solution for 2y^2+2y-13=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 2y^2+2y-13=0 equation:


Simplifying
2y2 + 2y + -13 = 0

Reorder the terms:
-13 + 2y + 2y2 = 0

Solving
-13 + 2y + 2y2 = 0

Solving for variable 'y'.

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-6.5 + y + y2 = 0

Move the constant term to the right:

Add '6.5' to each side of the equation.
-6.5 + y + 6.5 + y2 = 0 + 6.5

Reorder the terms:
-6.5 + 6.5 + y + y2 = 0 + 6.5

Combine like terms: -6.5 + 6.5 = 0.0
0.0 + y + y2 = 0 + 6.5
y + y2 = 0 + 6.5

Combine like terms: 0 + 6.5 = 6.5
y + y2 = 6.5

The y term is y.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + y2 = 6.5 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + y2 = 6.5 + 0.25

Combine like terms: 6.5 + 0.25 = 6.75
1.25 + y2 = 6.75

Factor a perfect square on the left side:
(y + 0.5)(y + 0.5) = 6.75

Calculate the square root of the right side: 2.598076211

Break this problem into two subproblems by setting 
(y + 0.5) equal to 2.598076211 and -2.598076211.

Subproblem 1

y + 0.5 = 2.598076211 Simplifying y + 0.5 = 2.598076211 Reorder the terms: 0.5 + y = 2.598076211 Solving 0.5 + y = 2.598076211 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + y = 2.598076211 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y = 2.598076211 + -0.5 y = 2.598076211 + -0.5 Combine like terms: 2.598076211 + -0.5 = 2.098076211 y = 2.098076211 Simplifying y = 2.098076211

Subproblem 2

y + 0.5 = -2.598076211 Simplifying y + 0.5 = -2.598076211 Reorder the terms: 0.5 + y = -2.598076211 Solving 0.5 + y = -2.598076211 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + y = -2.598076211 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y = -2.598076211 + -0.5 y = -2.598076211 + -0.5 Combine like terms: -2.598076211 + -0.5 = -3.098076211 y = -3.098076211 Simplifying y = -3.098076211

Solution

The solution to the problem is based on the solutions from the subproblems. y = {2.098076211, -3.098076211}

See similar equations:

| -1-3x+x^5=0 | | 11=u+3 | | M^2+2=0 | | x^5-3x=1 | | 6(x-5)=3(x+6) | | 12-3x+7+8x=6x+12+8x-29-3x | | (-8)(2)-(-3)(6)= | | x(x-4)=-24 | | 8(-3p-6)+7(p+6)=11 | | b-5+6b=15 | | lny+x=3x+2lnx | | n^3-11n^2+10n=0 | | x*(x^2-6x+8)=0 | | 4x-1(10-x)=8x-4 | | 3y=-24-x | | -3x+=-6x+8 | | -3m^2-3m+270=0 | | x^3-7x-8=0 | | 3-2(y-1)=2+11 | | 2x+3=5(x-1) | | 3p^3-2p^2-5p=0 | | 9(3x+1)=5(x+-3) | | -2x^2+20x-18=0 | | -2x+20x-18=0 | | 3x+3n=36 | | 5v^2+19v+12=0 | | 7-6(4-6x)=0 | | -11w-3=-3w-9 | | 4(x-.666)=-18 | | 112=8t+5t^2 | | 2p+1b=8n | | 4-(5x-2)=3(x+4) |

Equations solver categories