5y^2-y-1=0

Simple and best practice solution for 5y^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 5y^2-y-1=0 equation:


Simplifying
5y2 + -1y + -1 = 0

Reorder the terms:
-1 + -1y + 5y2 = 0

Solving
-1 + -1y + 5y2 = 0

Solving for variable 'y'.

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

Divide each side by '5'.
-0.2 + -0.2y + y2 = 0

Move the constant term to the right:

Add '0.2' to each side of the equation.
-0.2 + -0.2y + 0.2 + y2 = 0 + 0.2

Reorder the terms:
-0.2 + 0.2 + -0.2y + y2 = 0 + 0.2

Combine like terms: -0.2 + 0.2 = 0.0
0.0 + -0.2y + y2 = 0 + 0.2
-0.2y + y2 = 0 + 0.2

Combine like terms: 0 + 0.2 = 0.2
-0.2y + y2 = 0.2

The y term is -0.2y.  Take half its coefficient (-0.1).
Square it (0.01) and add it to both sides.

Add '0.01' to each side of the equation.
-0.2y + 0.01 + y2 = 0.2 + 0.01

Reorder the terms:
0.01 + -0.2y + y2 = 0.2 + 0.01

Combine like terms: 0.2 + 0.01 = 0.21
0.01 + -0.2y + y2 = 0.21

Factor a perfect square on the left side:
(y + -0.1)(y + -0.1) = 0.21

Calculate the square root of the right side: 0.458257569

Break this problem into two subproblems by setting 
(y + -0.1) equal to 0.458257569 and -0.458257569.

Subproblem 1

y + -0.1 = 0.458257569 Simplifying y + -0.1 = 0.458257569 Reorder the terms: -0.1 + y = 0.458257569 Solving -0.1 + y = 0.458257569 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + y = 0.458257569 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + y = 0.458257569 + 0.1 y = 0.458257569 + 0.1 Combine like terms: 0.458257569 + 0.1 = 0.558257569 y = 0.558257569 Simplifying y = 0.558257569

Subproblem 2

y + -0.1 = -0.458257569 Simplifying y + -0.1 = -0.458257569 Reorder the terms: -0.1 + y = -0.458257569 Solving -0.1 + y = -0.458257569 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + y = -0.458257569 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + y = -0.458257569 + 0.1 y = -0.458257569 + 0.1 Combine like terms: -0.458257569 + 0.1 = -0.358257569 y = -0.358257569 Simplifying y = -0.358257569

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.558257569, -0.358257569}

See similar equations:

| x+(x-17.8)=196.8 | | 4x/9-5=x | | 5x+5-2x=3+4 | | x-(-4x)=x+9 | | 4x^2-32x+64=3x^2-12x-36 | | 5(6x-2)+3(8-3x)-5(4x+4)=-3 | | 7-4y=3 | | -5n-6(n-5)=85 | | p=21+sw | | 4+7y=3 | | y^2+4y-7=0 | | -2(2s-6)-12=-3(7s+0)-4 | | -2(3b+4)+(7b-5)=0 | | 11x+25=7x-9 | | q^4+8=13 | | (x-5)*(x-5)-7=0 | | 5-7y=4 | | 2/11x2-9/11x2 | | -2(3v+4)+(7b-5)=0 | | 2(b+2)-(8+b)=-3 | | 5z^2-10z-5=-12z | | 3a-3whena=9 | | 12(3x+4)-5(2x-2)=6x-42 | | 3a-3a=9 | | 2x+10=5x-3 | | -6(4k-3)-3k=180 | | -2p+7=5-(6p+3) | | X^2+1/6x | | 27x+7x^2=40 | | 6x-(5x+8)= | | 4y^2+7y+41=3y^2+22y-13 | | 23+-3d=5 |

Equations solver categories