2y^2+8y=1

Simple and best practice solution for 2y^2+8y=1 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=1 equation:


Simplifying
2y2 + 8y = 1

Reorder the terms:
8y + 2y2 = 1

Solving
8y + 2y2 = 1

Solving for variable 'y'.

Reorder the terms:
-1 + 8y + 2y2 = 1 + -1

Combine like terms: 1 + -1 = 0
-1 + 8y + 2y2 = 0

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

Divide each side by '2'.
-0.5 + 4y + y2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + 4y + 0.5 + y2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + 4y + y2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + 4y + y2 = 0 + 0.5
4y + y2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
4y + y2 = 0.5

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 = 0.5 + 4

Reorder the terms:
4 + 4y + y2 = 0.5 + 4

Combine like terms: 0.5 + 4 = 4.5
4 + 4y + y2 = 4.5

Factor a perfect square on the left side:
(y + 2)(y + 2) = 4.5

Calculate the square root of the right side: 2.121320344

Break this problem into two subproblems by setting 
(y + 2) equal to 2.121320344 and -2.121320344.

Subproblem 1

y + 2 = 2.121320344 Simplifying y + 2 = 2.121320344 Reorder the terms: 2 + y = 2.121320344 Solving 2 + y = 2.121320344 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 = 2.121320344 + -2 Combine like terms: 2 + -2 = 0 0 + y = 2.121320344 + -2 y = 2.121320344 + -2 Combine like terms: 2.121320344 + -2 = 0.121320344 y = 0.121320344 Simplifying y = 0.121320344

Subproblem 2

y + 2 = -2.121320344 Simplifying y + 2 = -2.121320344 Reorder the terms: 2 + y = -2.121320344 Solving 2 + y = -2.121320344 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 = -2.121320344 + -2 Combine like terms: 2 + -2 = 0 0 + y = -2.121320344 + -2 y = -2.121320344 + -2 Combine like terms: -2.121320344 + -2 = -4.121320344 y = -4.121320344 Simplifying y = -4.121320344

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.121320344, -4.121320344}

See similar equations:

| -7+p=3 | | 4x+5y=4654 | | 5x+4y=1052 | | (5x+23)=(7x+13) | | 90=2w+2(15) | | 7x+5=3x+37 | | -9u-7=-8u | | -9d-12=-2(d+6)-7d | | 13=x+6 | | 3w=4w-6 | | -10x+5=5 | | 3x^2=-12x-2 | | -10(0)+5=y | | 16x^2-8x=0 | | 11(4-6y)+5(13y+2)=9 | | 2x^3+18=450 | | 6x=-3x+33 | | 3w+14=20 | | 9x^2+6x=0 | | 4p=49-63+42 | | 2x^2+15x-180=0 | | 2(-7)-9(1)= | | 36-44=h-7 | | 5m+6g=-3 | | 0.8x^2+5x+2=0 | | 5n=-12-8 | | -48=9x+3x | | 2y+21=9y-49 | | 87+70+r=210 | | w=n-8 | | x^2+10=46 | | 10=0.8k+3 |

Equations solver categories