2y^2-8y+5=0

Simple and best practice solution for 2y^2-8y+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^2-8y+5=0 equation:


Simplifying
2y2 + -8y + 5 = 0

Reorder the terms:
5 + -8y + 2y2 = 0

Solving
5 + -8y + 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 + -4y + y2 = 0

Move the constant term to the right:

Add '-2.5' to each side of the equation.
2.5 + -4y + -2.5 + y2 = 0 + -2.5

Reorder the terms:
2.5 + -2.5 + -4y + y2 = 0 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
0.0 + -4y + y2 = 0 + -2.5
-4y + y2 = 0 + -2.5

Combine like terms: 0 + -2.5 = -2.5
-4y + y2 = -2.5

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 = -2.5 + 4

Reorder the terms:
4 + -4y + y2 = -2.5 + 4

Combine like terms: -2.5 + 4 = 1.5
4 + -4y + y2 = 1.5

Factor a perfect square on the left side:
(y + -2)(y + -2) = 1.5

Calculate the square root of the right side: 1.224744871

Break this problem into two subproblems by setting 
(y + -2) equal to 1.224744871 and -1.224744871.

Subproblem 1

y + -2 = 1.224744871 Simplifying y + -2 = 1.224744871 Reorder the terms: -2 + y = 1.224744871 Solving -2 + y = 1.224744871 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 = 1.224744871 + 2 Combine like terms: -2 + 2 = 0 0 + y = 1.224744871 + 2 y = 1.224744871 + 2 Combine like terms: 1.224744871 + 2 = 3.224744871 y = 3.224744871 Simplifying y = 3.224744871

Subproblem 2

y + -2 = -1.224744871 Simplifying y + -2 = -1.224744871 Reorder the terms: -2 + y = -1.224744871 Solving -2 + y = -1.224744871 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 = -1.224744871 + 2 Combine like terms: -2 + 2 = 0 0 + y = -1.224744871 + 2 y = -1.224744871 + 2 Combine like terms: -1.224744871 + 2 = 0.775255129 y = 0.775255129 Simplifying y = 0.775255129

Solution

The solution to the problem is based on the solutions from the subproblems. y = {3.224744871, 0.775255129}

See similar equations:

| 10y-4y+2f+3f= | | x^2-1.44=0 | | z^2-6z+8= | | 4X-2=-5X+16 | | 7(x-3)=2 | | 8w+2.6-3.6=63 | | 4x^2-34x+16=0 | | 12(391)=340x | | 4x^2+27x-14=10-2x | | x^3-6x^2+120x-224=0 | | 6b-8=8b-5b+1 | | 4x^2-18x-52=0 | | 3x-3=6+6 | | 3x+39=-39 | | 12=x+13 | | 3p=2p-75 | | 9(x-6)=5 | | Lnx+ln(4x-3)=0 | | 3n^2-3n-3=0 | | 7x+11=-101 | | 2e+5=3e-2 | | 3y^2+12y=15 | | 6b=18-2b | | 54x^3-6x^2-4x=0 | | 10x-3=37 | | (9a-2)(4a+8)=0 | | 12(x-4)=-8-4 | | 9x^2+2x=0 | | graphy=x+7 | | 6x+18-5x=-3-10 | | 6x^2-3x+5=0 | | 6x+1=10x+3 |

Equations solver categories