3x^2-3x-5=0

Simple and best practice solution for 3x^2-3x-5=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^2-3x-5=0 equation:


Simplifying
3x2 + -3x + -5 = 0

Reorder the terms:
-5 + -3x + 3x2 = 0

Solving
-5 + -3x + 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'.
-1.666666667 + -1x + x2 = 0

Move the constant term to the right:

Add '1.666666667' to each side of the equation.
-1.666666667 + -1x + 1.666666667 + x2 = 0 + 1.666666667

Reorder the terms:
-1.666666667 + 1.666666667 + -1x + x2 = 0 + 1.666666667

Combine like terms: -1.666666667 + 1.666666667 = 0.000000000
0.000000000 + -1x + x2 = 0 + 1.666666667
-1x + x2 = 0 + 1.666666667

Combine like terms: 0 + 1.666666667 = 1.666666667
-1x + x2 = 1.666666667

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 1.666666667 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 1.666666667 + 0.25

Combine like terms: 1.666666667 + 0.25 = 1.916666667
0.25 + -1x + x2 = 1.916666667

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 1.916666667

Calculate the square root of the right side: 1.384437311

Break this problem into two subproblems by setting 
(x + -0.5) equal to 1.384437311 and -1.384437311.

Subproblem 1

x + -0.5 = 1.384437311 Simplifying x + -0.5 = 1.384437311 Reorder the terms: -0.5 + x = 1.384437311 Solving -0.5 + x = 1.384437311 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 1.384437311 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 1.384437311 + 0.5 x = 1.384437311 + 0.5 Combine like terms: 1.384437311 + 0.5 = 1.884437311 x = 1.884437311 Simplifying x = 1.884437311

Subproblem 2

x + -0.5 = -1.384437311 Simplifying x + -0.5 = -1.384437311 Reorder the terms: -0.5 + x = -1.384437311 Solving -0.5 + x = -1.384437311 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -1.384437311 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -1.384437311 + 0.5 x = -1.384437311 + 0.5 Combine like terms: -1.384437311 + 0.5 = -0.884437311 x = -0.884437311 Simplifying x = -0.884437311

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.884437311, -0.884437311}

See similar equations:

| 36x^4-12x^2=0 | | 4(y-5)=36 | | 4x-17=2x+9 | | -6y=-6x-9 | | 3(x-2)=9(x+2) | | 36x^3+3x^2-11x+2=0 | | -89-7x=8x+16 | | -6x-18=-132 | | 13+8x=33 | | -7x=-43 | | 6b-23=56 | | 9x-6y=14 | | 24x^2+40x=20x^2+40x | | x^4+11x^2-12=0 | | 0.25q=-20 | | 2x+8=24-8 | | 11x-184=4x-9 | | 53-2x=7x+20 | | 144=x^2+18x+81 | | 59-5x=4x+18 | | 13-7x=31-21x | | X^3+8x+15=0 | | 90-2x=3x+15 | | -80-10x=7x+22 | | -26-6x=14-20 | | x=7-y | | 2x-7=87-6x | | -2x=140 | | -48-3x=6-9x | | x+y+z=1 | | 7+7h-4+9= | | 14r^2+29r-15=0 |

Equations solver categories