3=y^2-2y-2

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


Simplifying
3 = y2 + -2y + -2

Reorder the terms:
3 = -2 + -2y + y2

Solving
3 = -2 + -2y + y2

Solving for variable 'y'.

Combine like terms: 3 + 2 = 5
5 + 2y + -1y2 = -2 + -2y + y2 + 2 + 2y + -1y2

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

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

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

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

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-5 + -2y + y2 = 0

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + -2y + 5 + y2 = 0 + 5

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

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

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

The y term is -2y.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2y + 1 + y2 = 5 + 1

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

Combine like terms: 5 + 1 = 6
1 + -2y + y2 = 6

Factor a perfect square on the left side:
(y + -1)(y + -1) = 6

Calculate the square root of the right side: 2.449489743

Break this problem into two subproblems by setting 
(y + -1) equal to 2.449489743 and -2.449489743.

Subproblem 1

y + -1 = 2.449489743 Simplifying y + -1 = 2.449489743 Reorder the terms: -1 + y = 2.449489743 Solving -1 + y = 2.449489743 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + y = 2.449489743 + 1 Combine like terms: -1 + 1 = 0 0 + y = 2.449489743 + 1 y = 2.449489743 + 1 Combine like terms: 2.449489743 + 1 = 3.449489743 y = 3.449489743 Simplifying y = 3.449489743

Subproblem 2

y + -1 = -2.449489743 Simplifying y + -1 = -2.449489743 Reorder the terms: -1 + y = -2.449489743 Solving -1 + y = -2.449489743 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + y = -2.449489743 + 1 Combine like terms: -1 + 1 = 0 0 + y = -2.449489743 + 1 y = -2.449489743 + 1 Combine like terms: -2.449489743 + 1 = -1.449489743 y = -1.449489743 Simplifying y = -1.449489743

Solution

The solution to the problem is based on the solutions from the subproblems. y = {3.449489743, -1.449489743}

See similar equations:

| 7(2-7x)=-231 | | (x+5)-2(3+5)-5x=13+4(x-1) | | -5=5n+6n-n | | 5.28+7.1x=-0.41(1+2)-6.3x | | 3.5n+6.4=4.25 | | 4y+24=5y+40 | | 8y-20=120 | | 2x-12=30+x | | 2x-51=99 | | 4y^2=7t+15 | | 6x-10y-25=0 | | 4(1x+7)=64 | | 11z+2=19z-2 | | 11z+2=19z-3 | | -8n-35=-7(n+4) | | -10-x+7x=32 | | -6(x-2x)+3=-5(3x-x)+8+15x | | 6-6x+4x=30 | | -(7x+2)=3(x-4) | | -2(x+4)+4=6(x+4)+1 | | 6k+43k=13 | | 5x+1+2x=-76 | | x+8-5x=-32 | | (-16x^2)-2x=o | | .5x-.1(6-x)=1.5 | | 1017.36=3.14*r | | 7x+5-6x=5 | | 2r-4+2r=-9 | | 78-16x=190 | | 6x-4(3-x)=4 | | 3x+2+x=2 | | 3x^2+4xy+5y^2-8=x^2+3xy+2y^2 |

Equations solver categories