9=.004x^2-.36x

Simple and best practice solution for 9=.004x^2-.36x 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 9=.004x^2-.36x equation:


Simplifying
9 = 0.004x2 + -0.36x

Reorder the terms:
9 = -0.36x + 0.004x2

Solving
9 = -0.36x + 0.004x2

Solving for variable 'x'.

Reorder the terms:
9 + 0.36x + -0.004x2 = -0.36x + 0.36x + 0.004x2 + -0.004x2

Combine like terms: -0.36x + 0.36x = 0.00
9 + 0.36x + -0.004x2 = 0.00 + 0.004x2 + -0.004x2
9 + 0.36x + -0.004x2 = 0.004x2 + -0.004x2

Combine like terms: 0.004x2 + -0.004x2 = 0.000
9 + 0.36x + -0.004x2 = 0.000

Begin completing the square.  Divide all terms by
-0.004 the coefficient of the squared term: 

Divide each side by '-0.004'.
-2250 + -90x + x2 = 0

Move the constant term to the right:

Add '2250' to each side of the equation.
-2250 + -90x + 2250 + x2 = 0 + 2250

Reorder the terms:
-2250 + 2250 + -90x + x2 = 0 + 2250

Combine like terms: -2250 + 2250 = 0
0 + -90x + x2 = 0 + 2250
-90x + x2 = 0 + 2250

Combine like terms: 0 + 2250 = 2250
-90x + x2 = 2250

The x term is -90x.  Take half its coefficient (-45).
Square it (2025) and add it to both sides.

Add '2025' to each side of the equation.
-90x + 2025 + x2 = 2250 + 2025

Reorder the terms:
2025 + -90x + x2 = 2250 + 2025

Combine like terms: 2250 + 2025 = 4275
2025 + -90x + x2 = 4275

Factor a perfect square on the left side:
(x + -45)(x + -45) = 4275

Calculate the square root of the right side: 65.383484153

Break this problem into two subproblems by setting 
(x + -45) equal to 65.383484153 and -65.383484153.

Subproblem 1

x + -45 = 65.383484153 Simplifying x + -45 = 65.383484153 Reorder the terms: -45 + x = 65.383484153 Solving -45 + x = 65.383484153 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '45' to each side of the equation. -45 + 45 + x = 65.383484153 + 45 Combine like terms: -45 + 45 = 0 0 + x = 65.383484153 + 45 x = 65.383484153 + 45 Combine like terms: 65.383484153 + 45 = 110.383484153 x = 110.383484153 Simplifying x = 110.383484153

Subproblem 2

x + -45 = -65.383484153 Simplifying x + -45 = -65.383484153 Reorder the terms: -45 + x = -65.383484153 Solving -45 + x = -65.383484153 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '45' to each side of the equation. -45 + 45 + x = -65.383484153 + 45 Combine like terms: -45 + 45 = 0 0 + x = -65.383484153 + 45 x = -65.383484153 + 45 Combine like terms: -65.383484153 + 45 = -20.383484153 x = -20.383484153 Simplifying x = -20.383484153

Solution

The solution to the problem is based on the solutions from the subproblems. x = {110.383484153, -20.383484153}

See similar equations:

| 4x-2(3x-2)=16 | | z^4+2iz^2-3=0 | | (2x+3)=6(3x-1) | | x+2+2x=17 | | 11x+24=5x+186 | | 5+7+6+12= | | 5+7+7+6= | | 5+5+7+7= | | 2.5+0.075p=0.19 | | 27-2x=9-8x | | -60/-169/-60/-169 | | 5x+6y=5400 | | 3a-2=-11 | | 152+(y-20)+(x+10)+z=360 | | 5x+6y=2711 | | [(x-110)/110]x100/1 | | (x+20)+(x+50)+(x+50)=360 | | 20x+50x+50x=360 | | 54+(6+3x)=90 | | (2x+13)+(2+3x)=90 | | 5x^4-3y=0 | | 96-5Y+X= | | 5/3-2x=6 | | 0=4x-9y-2 | | 4(x+3)squared= | | Log[3](5x-3)=3 | | (x-11)*2=2x-22 | | x=2x+160+125+110+112+147 | | 20/52= | | 2x^2-2x=10 | | 4p-(p+9)=3 | | y=-4x-101 |

Equations solver categories