2y^2-6=-9y

Simple and best practice solution for 2y^2-6=-9y 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^2-6=-9y equation:


Simplifying
2y2 + -6 = -9y

Reorder the terms:
-6 + 2y2 = -9y

Solving
-6 + 2y2 = -9y

Solving for variable 'y'.

Reorder the terms:
-6 + 9y + 2y2 = -9y + 9y

Combine like terms: -9y + 9y = 0
-6 + 9y + 2y2 = 0

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

Divide each side by '2'.
-3 + 4.5y + y2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + 4.5y + 3 + y2 = 0 + 3

Reorder the terms:
-3 + 3 + 4.5y + y2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 4.5y + y2 = 0 + 3
4.5y + y2 = 0 + 3

Combine like terms: 0 + 3 = 3
4.5y + y2 = 3

The y term is 4.5y.  Take half its coefficient (2.25).
Square it (5.0625) and add it to both sides.

Add '5.0625' to each side of the equation.
4.5y + 5.0625 + y2 = 3 + 5.0625

Reorder the terms:
5.0625 + 4.5y + y2 = 3 + 5.0625

Combine like terms: 3 + 5.0625 = 8.0625
5.0625 + 4.5y + y2 = 8.0625

Factor a perfect square on the left side:
(y + 2.25)(y + 2.25) = 8.0625

Calculate the square root of the right side: 2.839454173

Break this problem into two subproblems by setting 
(y + 2.25) equal to 2.839454173 and -2.839454173.

Subproblem 1

y + 2.25 = 2.839454173 Simplifying y + 2.25 = 2.839454173 Reorder the terms: 2.25 + y = 2.839454173 Solving 2.25 + y = 2.839454173 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + y = 2.839454173 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + y = 2.839454173 + -2.25 y = 2.839454173 + -2.25 Combine like terms: 2.839454173 + -2.25 = 0.589454173 y = 0.589454173 Simplifying y = 0.589454173

Subproblem 2

y + 2.25 = -2.839454173 Simplifying y + 2.25 = -2.839454173 Reorder the terms: 2.25 + y = -2.839454173 Solving 2.25 + y = -2.839454173 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + y = -2.839454173 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + y = -2.839454173 + -2.25 y = -2.839454173 + -2.25 Combine like terms: -2.839454173 + -2.25 = -5.089454173 y = -5.089454173 Simplifying y = -5.089454173

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.589454173, -5.089454173}

See similar equations:

| 2.7-27= | | 10x+10=6x | | 36x^4-25x^2=4 | | 7/(w+5)=-8 | | 8p^2+7p-9=0 | | 8x=4/11 | | (u-3)/(u-5)=(u+2)/(u-7)+1 | | 401x+11y=134 | | 9.63.2= | | W^2+10W-28=0 | | 4x=24-8x | | 6y^2-4y-3=0 | | -7.53= | | 5x^3-3x^2= | | 20y^2=53y+450 | | 158/2 | | 2x(5-x)=0 | | 8(-1.6)= | | 4y^2+32y+55=0 | | -6x^3-(-5x^2)= | | 1-(6c+7d)/(9c)+(3c+d)/(3c) | | 2(x+3)=2x+8 | | 5(x^2+4)=100 | | k/3+6=33 | | -7(7v+5)+7=315 | | -4(y-3)(-y+6)=0 | | 2x-3-(x+1)=-[x-3(x+2)]-(x+4) | | 14=2(17x+7) | | 3(6y-7)=15 | | (5-w)(4w+1)=0 | | (u+1)(u-5)=0 | | -28=2m-8 |

Equations solver categories