5x+18=3x^2

Simple and best practice solution for 5x+18=3x^2 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 5x+18=3x^2 equation:


Simplifying
5x + 18 = 3x2

Reorder the terms:
18 + 5x = 3x2

Solving
18 + 5x = 3x2

Solving for variable 'x'.

Combine like terms: 3x2 + -3x2 = 0
18 + 5x + -3x2 = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-6 + -1.666666667x + x2 = 0

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + -1.666666667x + 6 + x2 = 0 + 6

Reorder the terms:
-6 + 6 + -1.666666667x + x2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -1.666666667x + x2 = 0 + 6
-1.666666667x + x2 = 0 + 6

Combine like terms: 0 + 6 = 6
-1.666666667x + x2 = 6

The x term is -1.666666667x.  Take half its coefficient (-0.8333333335).
Square it (0.6944444447) and add it to both sides.

Add '0.6944444447' to each side of the equation.
-1.666666667x + 0.6944444447 + x2 = 6 + 0.6944444447

Reorder the terms:
0.6944444447 + -1.666666667x + x2 = 6 + 0.6944444447

Combine like terms: 6 + 0.6944444447 = 6.6944444447
0.6944444447 + -1.666666667x + x2 = 6.6944444447

Factor a perfect square on the left side:
(x + -0.8333333335)(x + -0.8333333335) = 6.6944444447

Calculate the square root of the right side: 2.587362449

Break this problem into two subproblems by setting 
(x + -0.8333333335) equal to 2.587362449 and -2.587362449.

Subproblem 1

x + -0.8333333335 = 2.587362449 Simplifying x + -0.8333333335 = 2.587362449 Reorder the terms: -0.8333333335 + x = 2.587362449 Solving -0.8333333335 + x = 2.587362449 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8333333335' to each side of the equation. -0.8333333335 + 0.8333333335 + x = 2.587362449 + 0.8333333335 Combine like terms: -0.8333333335 + 0.8333333335 = 0.0000000000 0.0000000000 + x = 2.587362449 + 0.8333333335 x = 2.587362449 + 0.8333333335 Combine like terms: 2.587362449 + 0.8333333335 = 3.4206957825 x = 3.4206957825 Simplifying x = 3.4206957825

Subproblem 2

x + -0.8333333335 = -2.587362449 Simplifying x + -0.8333333335 = -2.587362449 Reorder the terms: -0.8333333335 + x = -2.587362449 Solving -0.8333333335 + x = -2.587362449 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8333333335' to each side of the equation. -0.8333333335 + 0.8333333335 + x = -2.587362449 + 0.8333333335 Combine like terms: -0.8333333335 + 0.8333333335 = 0.0000000000 0.0000000000 + x = -2.587362449 + 0.8333333335 x = -2.587362449 + 0.8333333335 Combine like terms: -2.587362449 + 0.8333333335 = -1.7540291155 x = -1.7540291155 Simplifying x = -1.7540291155

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.4206957825, -1.7540291155}

See similar equations:

| 11x+4-8x= | | -56x+14= | | k/24=11/8 | | -35x-40= | | 7r=3+5r | | -(-x+10)= | | x+-3y=-5 | | x+-1y=3 | | 1/15=1/18=11 | | -22x-77= | | -15x-16=-121 | | h(x)=5x^2+5 | | 3x^9-6x^7= | | 1x^2+0x+0=0 | | 0.2y+2x=20 | | -7/10×50 | | -2y^2+6y+4=0 | | 30x+20y=2500 | | 6-5(-2n+3)= | | 5+2x=6x-11 | | 6mn-2mn-m= | | 9+6(4+4)=57 | | 6y-5x=1 | | -.875x+-6=-.375x+14 | | 4/3=18/x | | 1/4=x/16 | | 1/4-x/16 | | 20/x=12/100 | | =7-(4x+9) | | 5xy+4x+5yx= | | 2t^2+2x-3=0 | | -5.49+0.99y-8.89-5.16y= |

Equations solver categories