5y^2-2y-1=0

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


Simplifying
5y2 + -2y + -1 = 0

Reorder the terms:
-1 + -2y + 5y2 = 0

Solving
-1 + -2y + 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 + -0.4y + y2 = 0

Move the constant term to the right:

Add '0.2' to each side of the equation.
-0.2 + -0.4y + 0.2 + y2 = 0 + 0.2

Reorder the terms:
-0.2 + 0.2 + -0.4y + y2 = 0 + 0.2

Combine like terms: -0.2 + 0.2 = 0.0
0.0 + -0.4y + y2 = 0 + 0.2
-0.4y + y2 = 0 + 0.2

Combine like terms: 0 + 0.2 = 0.2
-0.4y + y2 = 0.2

The y term is -0.4y.  Take half its coefficient (-0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
-0.4y + 0.04 + y2 = 0.2 + 0.04

Reorder the terms:
0.04 + -0.4y + y2 = 0.2 + 0.04

Combine like terms: 0.2 + 0.04 = 0.24
0.04 + -0.4y + y2 = 0.24

Factor a perfect square on the left side:
(y + -0.2)(y + -0.2) = 0.24

Calculate the square root of the right side: 0.489897949

Break this problem into two subproblems by setting 
(y + -0.2) equal to 0.489897949 and -0.489897949.

Subproblem 1

y + -0.2 = 0.489897949 Simplifying y + -0.2 = 0.489897949 Reorder the terms: -0.2 + y = 0.489897949 Solving -0.2 + y = 0.489897949 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.2' to each side of the equation. -0.2 + 0.2 + y = 0.489897949 + 0.2 Combine like terms: -0.2 + 0.2 = 0.0 0.0 + y = 0.489897949 + 0.2 y = 0.489897949 + 0.2 Combine like terms: 0.489897949 + 0.2 = 0.689897949 y = 0.689897949 Simplifying y = 0.689897949

Subproblem 2

y + -0.2 = -0.489897949 Simplifying y + -0.2 = -0.489897949 Reorder the terms: -0.2 + y = -0.489897949 Solving -0.2 + y = -0.489897949 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.2' to each side of the equation. -0.2 + 0.2 + y = -0.489897949 + 0.2 Combine like terms: -0.2 + 0.2 = 0.0 0.0 + y = -0.489897949 + 0.2 y = -0.489897949 + 0.2 Combine like terms: -0.489897949 + 0.2 = -0.289897949 y = -0.289897949 Simplifying y = -0.289897949

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.689897949, -0.289897949}

See similar equations:

| 4-(1)= | | 5t^2-21t-28=0 | | 4-(9)= | | 3e+12=-9e+18 | | 13g+2=78 | | 6y-4=12y+38 | | 7v=81-2v | | 5y=24+y | | 6i(4i+7)= | | 0=-16t^2-18t+110 | | 3n-3=2 | | 4u=14-3u | | h=-16t^2-18t+110 | | y=x-6x+1 | | 8x-11=5x+9 | | 5(6z-1)-3(z+9)=17(z+1) | | x-11=4-4x | | 4x+5-8x+40-8=40x | | -3v(v+7)(v+9)=0 | | X/5-15=3 | | .6m-4.4-4.8=2.4 | | .33k+8=-4.3 | | X+216=4 | | X^2=-2+y+5cos(y) | | 6x/x^5 | | 136=2x+8x-14 | | 162x^2-32=0 | | 9x^2-4y^2+8y-40=0 | | b/10 | | -9=4x^2+16x | | 4-2[2-(5y-5)]= | | cos(x)=5x |

Equations solver categories