9x^2-12x+36=40

Simple and best practice solution for 9x^2-12x+36=40 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 9x^2-12x+36=40 equation:


Simplifying
9x2 + -12x + 36 = 40

Reorder the terms:
36 + -12x + 9x2 = 40

Solving
36 + -12x + 9x2 = 40

Solving for variable 'x'.

Reorder the terms:
36 + -40 + -12x + 9x2 = 40 + -40

Combine like terms: 36 + -40 = -4
-4 + -12x + 9x2 = 40 + -40

Combine like terms: 40 + -40 = 0
-4 + -12x + 9x2 = 0

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

Divide each side by '9'.
-0.4444444444 + -1.333333333x + x2 = 0

Move the constant term to the right:

Add '0.4444444444' to each side of the equation.
-0.4444444444 + -1.333333333x + 0.4444444444 + x2 = 0 + 0.4444444444

Reorder the terms:
-0.4444444444 + 0.4444444444 + -1.333333333x + x2 = 0 + 0.4444444444

Combine like terms: -0.4444444444 + 0.4444444444 = 0.0000000000
0.0000000000 + -1.333333333x + x2 = 0 + 0.4444444444
-1.333333333x + x2 = 0 + 0.4444444444

Combine like terms: 0 + 0.4444444444 = 0.4444444444
-1.333333333x + x2 = 0.4444444444

The x term is -1.333333333x.  Take half its coefficient (-0.6666666665).
Square it (0.4444444442) and add it to both sides.

Add '0.4444444442' to each side of the equation.
-1.333333333x + 0.4444444442 + x2 = 0.4444444444 + 0.4444444442

Reorder the terms:
0.4444444442 + -1.333333333x + x2 = 0.4444444444 + 0.4444444442

Combine like terms: 0.4444444444 + 0.4444444442 = 0.8888888886
0.4444444442 + -1.333333333x + x2 = 0.8888888886

Factor a perfect square on the left side:
(x + -0.6666666665)(x + -0.6666666665) = 0.8888888886

Calculate the square root of the right side: 0.942809041

Break this problem into two subproblems by setting 
(x + -0.6666666665) equal to 0.942809041 and -0.942809041.

Subproblem 1

x + -0.6666666665 = 0.942809041 Simplifying x + -0.6666666665 = 0.942809041 Reorder the terms: -0.6666666665 + x = 0.942809041 Solving -0.6666666665 + x = 0.942809041 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6666666665' to each side of the equation. -0.6666666665 + 0.6666666665 + x = 0.942809041 + 0.6666666665 Combine like terms: -0.6666666665 + 0.6666666665 = 0.0000000000 0.0000000000 + x = 0.942809041 + 0.6666666665 x = 0.942809041 + 0.6666666665 Combine like terms: 0.942809041 + 0.6666666665 = 1.6094757075 x = 1.6094757075 Simplifying x = 1.6094757075

Subproblem 2

x + -0.6666666665 = -0.942809041 Simplifying x + -0.6666666665 = -0.942809041 Reorder the terms: -0.6666666665 + x = -0.942809041 Solving -0.6666666665 + x = -0.942809041 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6666666665' to each side of the equation. -0.6666666665 + 0.6666666665 + x = -0.942809041 + 0.6666666665 Combine like terms: -0.6666666665 + 0.6666666665 = 0.0000000000 0.0000000000 + x = -0.942809041 + 0.6666666665 x = -0.942809041 + 0.6666666665 Combine like terms: -0.942809041 + 0.6666666665 = -0.2761423745 x = -0.2761423745 Simplifying x = -0.2761423745

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.6094757075, -0.2761423745}

See similar equations:

| 2x-7+15=5x+8+12 | | 4a^2+a-83=0 | | 3(2x-4y)-4(1x-5)=24 | | 7k-2(4k-6)=-4+3k | | 10x-4=40x | | -4.1(-0.505+4.5b)=3.7b-25.217 | | 2x-6y=x-76 | | v^2-13v=6 | | (5/6)2= | | f(x)=2e^10x-7 | | 203=-7(1-5x) | | a=2t+dt | | 27=3c-3(6c-2c) | | 3(x+8)-21= | | g(p+4)=2x^2+3x+3 | | -7y+6=-8 | | (x-2)+(3x-7)+5x=180 | | (11t-17)+48.8=90 | | 2x-3(7x)+4-8(5)=X | | 26+x=12-14+x+x+23 | | a^2+8a-90=0 | | -6(x-6)+2=38 | | 10-3(x-2)=7 | | -4.1(-0.505-4.5b)=3.7b-25.217 | | 3(n+4)=38+2n | | -7(X+3)=3(2x-5)-X | | 1-r/9=1 | | 4x+5(y+8)= | | -4(x-6)+9x-8= | | 122+10x=230+7x | | Twothirds=onethird+a | | 70=10(x-7) |

Equations solver categories