2y^2-6y-11=0

Simple and best practice solution for 2y^2-6y-11=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 2y^2-6y-11=0 equation:


Simplifying
2y2 + -6y + -11 = 0

Reorder the terms:
-11 + -6y + 2y2 = 0

Solving
-11 + -6y + 2y2 = 0

Solving for variable 'y'.

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

Divide each side by '2'.
-5.5 + -3y + y2 = 0

Move the constant term to the right:

Add '5.5' to each side of the equation.
-5.5 + -3y + 5.5 + y2 = 0 + 5.5

Reorder the terms:
-5.5 + 5.5 + -3y + y2 = 0 + 5.5

Combine like terms: -5.5 + 5.5 = 0.0
0.0 + -3y + y2 = 0 + 5.5
-3y + y2 = 0 + 5.5

Combine like terms: 0 + 5.5 = 5.5
-3y + y2 = 5.5

The y term is -3y.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3y + 2.25 + y2 = 5.5 + 2.25

Reorder the terms:
2.25 + -3y + y2 = 5.5 + 2.25

Combine like terms: 5.5 + 2.25 = 7.75
2.25 + -3y + y2 = 7.75

Factor a perfect square on the left side:
(y + -1.5)(y + -1.5) = 7.75

Calculate the square root of the right side: 2.783882181

Break this problem into two subproblems by setting 
(y + -1.5) equal to 2.783882181 and -2.783882181.

Subproblem 1

y + -1.5 = 2.783882181 Simplifying y + -1.5 = 2.783882181 Reorder the terms: -1.5 + y = 2.783882181 Solving -1.5 + y = 2.783882181 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + y = 2.783882181 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + y = 2.783882181 + 1.5 y = 2.783882181 + 1.5 Combine like terms: 2.783882181 + 1.5 = 4.283882181 y = 4.283882181 Simplifying y = 4.283882181

Subproblem 2

y + -1.5 = -2.783882181 Simplifying y + -1.5 = -2.783882181 Reorder the terms: -1.5 + y = -2.783882181 Solving -1.5 + y = -2.783882181 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + y = -2.783882181 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + y = -2.783882181 + 1.5 y = -2.783882181 + 1.5 Combine like terms: -2.783882181 + 1.5 = -1.283882181 y = -1.283882181 Simplifying y = -1.283882181

Solution

The solution to the problem is based on the solutions from the subproblems. y = {4.283882181, -1.283882181}

See similar equations:

| -7z^6-(-2z^6-3)= | | 2x^2-5x+6=-2 | | 8+9lnx=35 | | (C+3)+6=61 | | 3x+y=-32x | | (3n-5)(2n-2)=6 | | 5-5x=-7(7-7x) | | 24s^3+92s^2+84s=0 | | 33-2m=-4(1-7m)+7m | | 3x-10+180=x+40 | | 7(6v+2)+2=6v-20 | | 8x^2-2x=0 | | 12n^3-48=0 | | 7z^2+2z-5=0 | | 6u^2+4u+11=0 | | r-31=3(-6r-4) | | 6(b-4)=-36+8b | | (a-6)(a-5)= | | -4b+6(-2b+7)=3-3b | | 2b^2-8=0 | | 9x^3+17x^2-2x=0 | | 6t-1=49 | | 12x+1-23= | | -8=5y+22 | | 9=x+(5) | | -1-6(k-2)=6-5k | | 3x-8y=4 | | 3x+2(x+5)=x+30 | | -76=6(2x-2)-8(-4x-3) | | 20w^13+16w^8=w | | =x+30 | | 4(5a+2)= |

Equations solver categories