3x^2-8x-234=0

Simple and best practice solution for 3x^2-8x-234=0 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 3x^2-8x-234=0 equation:


Simplifying
3x2 + -8x + -234 = 0

Reorder the terms:
-234 + -8x + 3x2 = 0

Solving
-234 + -8x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
-78 + -2.666666667x + x2 = 0

Move the constant term to the right:

Add '78' to each side of the equation.
-78 + -2.666666667x + 78 + x2 = 0 + 78

Reorder the terms:
-78 + 78 + -2.666666667x + x2 = 0 + 78

Combine like terms: -78 + 78 = 0
0 + -2.666666667x + x2 = 0 + 78
-2.666666667x + x2 = 0 + 78

Combine like terms: 0 + 78 = 78
-2.666666667x + x2 = 78

The x term is -2.666666667x.  Take half its coefficient (-1.333333334).
Square it (1.777777780) and add it to both sides.

Add '1.777777780' to each side of the equation.
-2.666666667x + 1.777777780 + x2 = 78 + 1.777777780

Reorder the terms:
1.777777780 + -2.666666667x + x2 = 78 + 1.777777780

Combine like terms: 78 + 1.777777780 = 79.77777778
1.777777780 + -2.666666667x + x2 = 79.77777778

Factor a perfect square on the left side:
(x + -1.333333334)(x + -1.333333334) = 79.77777778

Calculate the square root of the right side: 8.931840671

Break this problem into two subproblems by setting 
(x + -1.333333334) equal to 8.931840671 and -8.931840671.

Subproblem 1

x + -1.333333334 = 8.931840671 Simplifying x + -1.333333334 = 8.931840671 Reorder the terms: -1.333333334 + x = 8.931840671 Solving -1.333333334 + x = 8.931840671 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + x = 8.931840671 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = 8.931840671 + 1.333333334 x = 8.931840671 + 1.333333334 Combine like terms: 8.931840671 + 1.333333334 = 10.265174005 x = 10.265174005 Simplifying x = 10.265174005

Subproblem 2

x + -1.333333334 = -8.931840671 Simplifying x + -1.333333334 = -8.931840671 Reorder the terms: -1.333333334 + x = -8.931840671 Solving -1.333333334 + x = -8.931840671 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + x = -8.931840671 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = -8.931840671 + 1.333333334 x = -8.931840671 + 1.333333334 Combine like terms: -8.931840671 + 1.333333334 = -7.598507337 x = -7.598507337 Simplifying x = -7.598507337

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.265174005, -7.598507337}

See similar equations:

| -2y-y=9 | | 7=u+15 | | 3g+-9=9 | | 8x-(x+2)=100 | | ln(x+1)-ln(2x)=4 | | 5x+(5x+5x)= | | x/4-8=17 | | 4(n-4)=4n | | 8+8-5-x=40 | | x^2-400x+36864=0 | | m^2-5m-6= | | 6-3x=-4x+8 | | 18-x+3=40 | | -7a-7b+3a-9b= | | 10q+15+18q-16= | | 8x+3=25 | | 3c+-15=90 | | y^2-18y-34=0 | | (2x+8)+(21)(21)=x^2+27(27) | | 1/2-2/3v=-2/7 | | 20gsquared=16g | | 9b-20=8b | | -14(-6y+5)= | | 6-0.2(x+2)=4x-0.7 | | -6(2t+10)=-132 | | 6m-29=-41+3m | | 8p+2=4+7p | | (4-w)(2-5)=0 | | 2c+1l=2.5 | | 6(y-5)=5n+19 | | 3x+30=105 | | (A-6bc)(5a+4bc)= |

Equations solver categories