9x^2=3-8x

Simple and best practice solution for 9x^2=3-8x 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=3-8x equation:


Simplifying
9x2 = 3 + -8x

Solving
9x2 = 3 + -8x

Solving for variable 'x'.

Reorder the terms:
-3 + 8x + 9x2 = 3 + -8x + -3 + 8x

Reorder the terms:
-3 + 8x + 9x2 = 3 + -3 + -8x + 8x

Combine like terms: 3 + -3 = 0
-3 + 8x + 9x2 = 0 + -8x + 8x
-3 + 8x + 9x2 = -8x + 8x

Combine like terms: -8x + 8x = 0
-3 + 8x + 9x2 = 0

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

Divide each side by '9'.
-0.3333333333 + 0.8888888889x + x2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + 0.8888888889x + 0.3333333333 + x2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + 0.8888888889x + x2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + 0.8888888889x + x2 = 0 + 0.3333333333
0.8888888889x + x2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
0.8888888889x + x2 = 0.3333333333

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 = 0.3333333333 + 0.1975308642

Reorder the terms:
0.1975308642 + 0.8888888889x + x2 = 0.3333333333 + 0.1975308642

Combine like terms: 0.3333333333 + 0.1975308642 = 0.5308641975
0.1975308642 + 0.8888888889x + x2 = 0.5308641975

Factor a perfect square on the left side:
(x + 0.4444444445)(x + 0.4444444445) = 0.5308641975

Calculate the square root of the right side: 0.72860428

Break this problem into two subproblems by setting 
(x + 0.4444444445) equal to 0.72860428 and -0.72860428.

Subproblem 1

x + 0.4444444445 = 0.72860428 Simplifying x + 0.4444444445 = 0.72860428 Reorder the terms: 0.4444444445 + x = 0.72860428 Solving 0.4444444445 + x = 0.72860428 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 = 0.72860428 + -0.4444444445 Combine like terms: 0.4444444445 + -0.4444444445 = 0.0000000000 0.0000000000 + x = 0.72860428 + -0.4444444445 x = 0.72860428 + -0.4444444445 Combine like terms: 0.72860428 + -0.4444444445 = 0.2841598355 x = 0.2841598355 Simplifying x = 0.2841598355

Subproblem 2

x + 0.4444444445 = -0.72860428 Simplifying x + 0.4444444445 = -0.72860428 Reorder the terms: 0.4444444445 + x = -0.72860428 Solving 0.4444444445 + x = -0.72860428 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 = -0.72860428 + -0.4444444445 Combine like terms: 0.4444444445 + -0.4444444445 = 0.0000000000 0.0000000000 + x = -0.72860428 + -0.4444444445 x = -0.72860428 + -0.4444444445 Combine like terms: -0.72860428 + -0.4444444445 = -1.1730487245 x = -1.1730487245 Simplifying x = -1.1730487245

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.2841598355, -1.1730487245}

See similar equations:

| 4(x-2)-5=7(x+3x) | | 15x^2+2x-77=0 | | -2(x+6)+5=-7 | | -5x=18-x | | 10=4e^3-5x | | [-15+(-9)]+[2+(-4)]+(-14)= | | -2.5c=18 | | .4(4x)+x=2400 | | 2/4(-4+1b)=b/5 | | 7x=x+2 | | (x)6+1=(x)5-2 | | 7(y-8)+24=-7(y-6) | | 57=-3(1-4x) | | -3=3-r | | 2(1s-5)=2(1s+5) | | -10+6q=3q-20 | | -6x+8+4x=-2x-13 | | 7+20x=42+13x | | 8=3-y | | 410x-4000-x^2=0 | | 1+4u=9 | | d=9x+3c | | 28=9d-18 | | -5x+36=x | | -3v+2=5 | | 3(6-6x^2)=6 | | 5.9+0.7(3.7)-1.26= | | ln(2x+2)=ln(6x+2)-ln(x) | | 6r^1*5r^2= | | (x+8)(x-2)(x)=96 | | -4x-21=39 | | 10q=5q+25 |

Equations solver categories