y(y-6)=9

Simple and best practice solution for y(y-6)=9 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 y(y-6)=9 equation:


Simplifying
y(y + -6) = 9

Reorder the terms:
y(-6 + y) = 9
(-6 * y + y * y) = 9
(-6y + y2) = 9

Solving
-6y + y2 = 9

Solving for variable 'y'.

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

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

Begin completing the square.

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + -6y + 9 + y2 = 0 + 9

Reorder the terms:
-9 + 9 + -6y + y2 = 0 + 9

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

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

The y term is -6y.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6y + 9 + y2 = 9 + 9

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

Combine like terms: 9 + 9 = 18
9 + -6y + y2 = 18

Factor a perfect square on the left side:
(y + -3)(y + -3) = 18

Calculate the square root of the right side: 4.242640687

Break this problem into two subproblems by setting 
(y + -3) equal to 4.242640687 and -4.242640687.

Subproblem 1

y + -3 = 4.242640687 Simplifying y + -3 = 4.242640687 Reorder the terms: -3 + y = 4.242640687 Solving -3 + y = 4.242640687 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + y = 4.242640687 + 3 Combine like terms: -3 + 3 = 0 0 + y = 4.242640687 + 3 y = 4.242640687 + 3 Combine like terms: 4.242640687 + 3 = 7.242640687 y = 7.242640687 Simplifying y = 7.242640687

Subproblem 2

y + -3 = -4.242640687 Simplifying y + -3 = -4.242640687 Reorder the terms: -3 + y = -4.242640687 Solving -3 + y = -4.242640687 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + y = -4.242640687 + 3 Combine like terms: -3 + 3 = 0 0 + y = -4.242640687 + 3 y = -4.242640687 + 3 Combine like terms: -4.242640687 + 3 = -1.242640687 y = -1.242640687 Simplifying y = -1.242640687

Solution

The solution to the problem is based on the solutions from the subproblems. y = {7.242640687, -1.242640687}

See similar equations:

| 20ln(.2)x=30 | | 0.93=(x-17.25)/2 | | 2x^2+4=92 | | 25-x+x+40-x+2x=80 | | C/9=-2 | | 300,45/15 | | 4a+3c=506 | | X+25+x+2=25 | | 2A+3B=204 | | x(3x+2)+4=3(x^2+x) | | [7m+2]=9 | | f(100)=0.41ln(100+1) | | 3x^2-2y^3=12 | | 10a+30b=360 | | 8x^2+13x=6 | | 4a+6b+9c=2009 | | 15.00*x=18.48 | | a=30+-1.5b | | 10a+15b=300 | | Pix(4.5)2= | | a/7-1=4 | | 14-(-7x)+5x-(-11)= | | 5.2q-4.6-7.1q=-0.9q-4 | | 8x=7(x+24) | | 4.2+1.8y=5 | | 4x^3-15x+18=0 | | 7x=7(x+24) | | 5m-15=35-10m | | X=189.95+-0.07x | | 0.5*x-7.5=4 | | (x-2y)=34 | | X+.07x=189.95 |

Equations solver categories