2y^2+6y-5=0

Simple and best practice solution for 2y^2+6y-5=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+6y-5=0 equation:


Simplifying
2y2 + 6y + -5 = 0

Reorder the terms:
-5 + 6y + 2y2 = 0

Solving
-5 + 6y + 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'.
-2.5 + 3y + y2 = 0

Move the constant term to the right:

Add '2.5' to each side of the equation.
-2.5 + 3y + 2.5 + y2 = 0 + 2.5

Reorder the terms:
-2.5 + 2.5 + 3y + y2 = 0 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0
0.0 + 3y + y2 = 0 + 2.5
3y + y2 = 0 + 2.5

Combine like terms: 0 + 2.5 = 2.5
3y + y2 = 2.5

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 = 2.5 + 2.25

Reorder the terms:
2.25 + 3y + y2 = 2.5 + 2.25

Combine like terms: 2.5 + 2.25 = 4.75
2.25 + 3y + y2 = 4.75

Factor a perfect square on the left side:
(y + 1.5)(y + 1.5) = 4.75

Calculate the square root of the right side: 2.179449472

Break this problem into two subproblems by setting 
(y + 1.5) equal to 2.179449472 and -2.179449472.

Subproblem 1

y + 1.5 = 2.179449472 Simplifying y + 1.5 = 2.179449472 Reorder the terms: 1.5 + y = 2.179449472 Solving 1.5 + y = 2.179449472 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 = 2.179449472 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + y = 2.179449472 + -1.5 y = 2.179449472 + -1.5 Combine like terms: 2.179449472 + -1.5 = 0.679449472 y = 0.679449472 Simplifying y = 0.679449472

Subproblem 2

y + 1.5 = -2.179449472 Simplifying y + 1.5 = -2.179449472 Reorder the terms: 1.5 + y = -2.179449472 Solving 1.5 + y = -2.179449472 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 = -2.179449472 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + y = -2.179449472 + -1.5 y = -2.179449472 + -1.5 Combine like terms: -2.179449472 + -1.5 = -3.679449472 y = -3.679449472 Simplifying y = -3.679449472

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.679449472, -3.679449472}

See similar equations:

| 2j=8.2 | | 12-(3m+6)=5+3m-11 | | 15a-11a=20 | | 38-n=5n-4(-3-5n) | | x+9=15-x | | 18-(5m+5)=3+2m-18 | | 4-r=-18 | | 143=-7n-6(5n+7) | | 15p+12q+p-3q-4p= | | 3y+16=5y-2(y-8) | | 11x-3=5x+7 | | 13y=27 | | -11u-4u= | | (9w+4)(5w-15)=0 | | p+(-18)=-14 | | 7m+6n-4m+10n= | | -x-7=17 | | 4x-1.3x= | | 34=3p+7 | | 3x+15=4(2x-3) | | 34=3p | | -4=-16-v | | (X^4)+100=0 | | -5+9x=58 | | 6(2-8x)=156 | | c/4=2=4 | | -35=-7m | | 6(x^2-4x)=0 | | 5-n=4 | | 35=10y+5 | | -3+11=-8w+15 | | -82-=2(5v+6) |

Equations solver categories