5y^2-1=2y

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


Simplifying
5y2 + -1 = 2y

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

Solving
-1 + 5y2 = 2y

Solving for variable 'y'.

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

Combine like terms: 2y + -2y = 0
-1 + -2y + 5y2 = 0

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:

| 5X+5X=1 | | 4x-9x-12=-5x+5-12 | | -3y(4y-5)-y=-4(y-5) | | 6v^2-9v+11=0 | | 8p-12=9-5p | | (8a2b7/4a5b5)^(-3) | | (x^3)+(2x^2)-(3x)=0 | | 37x+16=6(6x+5) | | (8a^2b^7/4a^5b^5)^(-3) | | 20y=4x+3 | | 7=x-4.3 | | 9(3n+5)=6(3n+6)+9 | | 4(x-2)-5(3x+1)= | | 2x^2+8y=x^2-8y | | 3.9x-0.1=-7.9 | | 29t-9=15+-3 | | -225+(-5*15)= | | y=2.25(16y+3.25)y+1 | | 100x-(100x*.02)=100 | | 1.5wheny=6.3 | | 5m-4m+4= | | log(5)(x-4)+log(5)(x+120)=3 | | -4(4x-8)+1=-16x+33 | | 2x+2=2(x-9) | | 25x+4=14 | | 4x-x^2-16=0 | | 5a*3a= | | 3150=ct*0.6*3.50 | | 7x-6=6+3x | | .5x+8=x-4 | | 5y+8=2y-4 | | 755.00÷1/5= |

Equations solver categories