3y^2+y-1=0

Simple and best practice solution for 3y^2+y-1=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 3y^2+y-1=0 equation:


Simplifying
3y2 + y + -1 = 0

Reorder the terms:
-1 + y + 3y2 = 0

Solving
-1 + y + 3y2 = 0

Solving for variable 'y'.

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

Divide each side by '3'.
-0.3333333333 + 0.3333333333y + y2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + 0.3333333333y + 0.3333333333 + y2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + 0.3333333333y + y2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + 0.3333333333y + y2 = 0 + 0.3333333333
0.3333333333y + y2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
0.3333333333y + y2 = 0.3333333333

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.
0.3333333333y + 0.25 + y2 = 0.3333333333 + 0.25

Reorder the terms:
0.25 + 0.3333333333y + y2 = 0.3333333333 + 0.25

Combine like terms: 0.3333333333 + 0.25 = 0.5833333333
0.25 + 0.3333333333y + y2 = 0.5833333333

Factor a perfect square on the left side:
(y + 0.5)(y + 0.5) = 0.5833333333

Calculate the square root of the right side: 0.763762616

Break this problem into two subproblems by setting 
(y + 0.5) equal to 0.763762616 and -0.763762616.

Subproblem 1

y + 0.5 = 0.763762616 Simplifying y + 0.5 = 0.763762616 Reorder the terms: 0.5 + y = 0.763762616 Solving 0.5 + y = 0.763762616 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 = 0.763762616 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y = 0.763762616 + -0.5 y = 0.763762616 + -0.5 Combine like terms: 0.763762616 + -0.5 = 0.263762616 y = 0.263762616 Simplifying y = 0.263762616

Subproblem 2

y + 0.5 = -0.763762616 Simplifying y + 0.5 = -0.763762616 Reorder the terms: 0.5 + y = -0.763762616 Solving 0.5 + y = -0.763762616 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 = -0.763762616 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y = -0.763762616 + -0.5 y = -0.763762616 + -0.5 Combine like terms: -0.763762616 + -0.5 = -1.263762616 y = -1.263762616 Simplifying y = -1.263762616

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.263762616, -1.263762616}

See similar equations:

| 0.08+0.14(10,000-x)= | | 1=0.1x-0.3x-5 | | G(3)=4[3-3(2-4x)] | | (-6z^2+5z+4)=0 | | 4(2-3x)+8=-x+27 | | 15-3x-3x=18+3 | | 6x+2x=15 | | 3(3+2x)=5(x-4) | | 6x+7(1+5x)=7-x | | 6x+1=6(x-9) | | 2p^2+8=17p | | 1/4x^2-3 | | 8x-1=(-x)+1 | | 5x-4=3x-20 | | 4x-79=2 | | (4q+2)-(2q-3)+(3q-1)= | | n^3-n-336=0 | | -7a-2b+3a-6b= | | 3y^2+y=1 | | 38=5(2x-3)+3x+1 | | -6(8+6p)+6p=-6p | | x+662=3y | | .40x+.20(40)=.20(74) | | -7c(5x-7)6(6x)+28(5x-7)10(6x)-14c(5x-7)4(24)= | | 16-5p+p=10 | | 5x=2x+22+x | | 3(3+x)=2x+4 | | -40+n=8(8n-5) | | 2.5(x-3)-3+1.7x=10.8(x+1.5) | | (6y^1/2)/(x^4/3)=(12y/x^1/3) | | 5x+8-x=6(x-1) | | -1/9(-3/4)= |

Equations solver categories