9x^2=2-8x

Simple and best practice solution for 9x^2=2-8x 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=2-8x equation:


Simplifying
9x2 = 2 + -8x

Solving
9x2 = 2 + -8x

Solving for variable 'x'.

Reorder the terms:
-2 + 8x + 9x2 = 2 + -8x + -2 + 8x

Reorder the terms:
-2 + 8x + 9x2 = 2 + -2 + -8x + 8x

Combine like terms: 2 + -2 = 0
-2 + 8x + 9x2 = 0 + -8x + 8x
-2 + 8x + 9x2 = -8x + 8x

Combine like terms: -8x + 8x = 0
-2 + 8x + 9x2 = 0

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

Divide each side by '9'.
-0.2222222222 + 0.8888888889x + x2 = 0

Move the constant term to the right:

Add '0.2222222222' to each side of the equation.
-0.2222222222 + 0.8888888889x + 0.2222222222 + x2 = 0 + 0.2222222222

Reorder the terms:
-0.2222222222 + 0.2222222222 + 0.8888888889x + x2 = 0 + 0.2222222222

Combine like terms: -0.2222222222 + 0.2222222222 = 0.0000000000
0.0000000000 + 0.8888888889x + x2 = 0 + 0.2222222222
0.8888888889x + x2 = 0 + 0.2222222222

Combine like terms: 0 + 0.2222222222 = 0.2222222222
0.8888888889x + x2 = 0.2222222222

The x term is 0.8888888889x.  Take half its coefficient (0.4444444445).
Square it (0.1975308642) and add it to both sides.

Add '0.1975308642' to each side of the equation.
0.8888888889x + 0.1975308642 + x2 = 0.2222222222 + 0.1975308642

Reorder the terms:
0.1975308642 + 0.8888888889x + x2 = 0.2222222222 + 0.1975308642

Combine like terms: 0.2222222222 + 0.1975308642 = 0.4197530864
0.1975308642 + 0.8888888889x + x2 = 0.4197530864

Factor a perfect square on the left side:
(x + 0.4444444445)(x + 0.4444444445) = 0.4197530864

Calculate the square root of the right side: 0.647883544

Break this problem into two subproblems by setting 
(x + 0.4444444445) equal to 0.647883544 and -0.647883544.

Subproblem 1

x + 0.4444444445 = 0.647883544 Simplifying x + 0.4444444445 = 0.647883544 Reorder the terms: 0.4444444445 + x = 0.647883544 Solving 0.4444444445 + x = 0.647883544 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4444444445' to each side of the equation. 0.4444444445 + -0.4444444445 + x = 0.647883544 + -0.4444444445 Combine like terms: 0.4444444445 + -0.4444444445 = 0.0000000000 0.0000000000 + x = 0.647883544 + -0.4444444445 x = 0.647883544 + -0.4444444445 Combine like terms: 0.647883544 + -0.4444444445 = 0.2034390995 x = 0.2034390995 Simplifying x = 0.2034390995

Subproblem 2

x + 0.4444444445 = -0.647883544 Simplifying x + 0.4444444445 = -0.647883544 Reorder the terms: 0.4444444445 + x = -0.647883544 Solving 0.4444444445 + x = -0.647883544 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4444444445' to each side of the equation. 0.4444444445 + -0.4444444445 + x = -0.647883544 + -0.4444444445 Combine like terms: 0.4444444445 + -0.4444444445 = 0.0000000000 0.0000000000 + x = -0.647883544 + -0.4444444445 x = -0.647883544 + -0.4444444445 Combine like terms: -0.647883544 + -0.4444444445 = -1.0923279885 x = -1.0923279885 Simplifying x = -1.0923279885

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.2034390995, -1.0923279885}

See similar equations:

| 1.6f-72=4h-30 | | 10(2x+1)=3(5x-5) | | 4x+5=-2x-7 | | 1.6f-72=4h-40 | | -11+x/7=-14 | | 7y+6y=13y | | 8.7+-14.63+4.5= | | 5x-200=205 | | 6(x-8)=4(x+10) | | (3*4+5n)=66 | | 9x+4=9(x-1) | | -2y+2=x | | 5.89x-31.94=27.51-3.21 | | 2(8.5)-3= | | 5(x-4)(2x-5)=0 | | 8.7+-14.63= | | x/4-6=-10 | | 3x(5x-2)+4x=9x+6-2x | | 8+4n=4 | | -5+20x+19x=90 | | x^2-.2=-.06x | | (2y)(2y)(2y)-2.8(5.89+3y)=-23.87-8.4y | | 0.2x+19=0.2x+45 | | -4x-6y-3x+7y= | | 2w-3-14= | | (-2w^2+4w-7)+(3w^2+6w+5)= | | .2(4y-1)=2 | | -5+20x+19x=180 | | (3*4)(5n)=66 | | f(x)=x^2+5x+2 | | 20x-45=214 | | 2m+3=17 |

Equations solver categories