x^2-3x-1.66666667=0

Simple and best practice solution for x^2-3x-1.66666667=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 x^2-3x-1.66666667=0 equation:


Simplifying
x2 + -3x + -1.66666667 = 0

Reorder the terms:
-1.66666667 + -3x + x2 = 0

Solving
-1.66666667 + -3x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '1.66666667' to each side of the equation.
-1.66666667 + -3x + 1.66666667 + x2 = 0 + 1.66666667

Reorder the terms:
-1.66666667 + 1.66666667 + -3x + x2 = 0 + 1.66666667

Combine like terms: -1.66666667 + 1.66666667 = 0.00000000
0.00000000 + -3x + x2 = 0 + 1.66666667
-3x + x2 = 0 + 1.66666667

Combine like terms: 0 + 1.66666667 = 1.66666667
-3x + x2 = 1.66666667

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = 1.66666667 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 1.66666667 + 2.25

Combine like terms: 1.66666667 + 2.25 = 3.91666667
2.25 + -3x + x2 = 3.91666667

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 3.91666667

Calculate the square root of the right side: 1.979057015

Break this problem into two subproblems by setting 
(x + -1.5) equal to 1.979057015 and -1.979057015.

Subproblem 1

x + -1.5 = 1.979057015 Simplifying x + -1.5 = 1.979057015 Reorder the terms: -1.5 + x = 1.979057015 Solving -1.5 + x = 1.979057015 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 1.979057015 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 1.979057015 + 1.5 x = 1.979057015 + 1.5 Combine like terms: 1.979057015 + 1.5 = 3.479057015 x = 3.479057015 Simplifying x = 3.479057015

Subproblem 2

x + -1.5 = -1.979057015 Simplifying x + -1.5 = -1.979057015 Reorder the terms: -1.5 + x = -1.979057015 Solving -1.5 + x = -1.979057015 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -1.979057015 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -1.979057015 + 1.5 x = -1.979057015 + 1.5 Combine like terms: -1.979057015 + 1.5 = -0.479057015 x = -0.479057015 Simplifying x = -0.479057015

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.479057015, -0.479057015}

See similar equations:

| 9x^2+3x-2=0form | | 3x-36=108 | | (6k^2)-17k+5=0 | | 42x^2-23x+1=0 | | 4(b-2)=10-2b | | (-7a)(-7a)(-7a)(-7a)(bc)(bc)(bc)(5ab)(5ab)(5ab)(5ab)(c)(c)= | | 1.04-2=0.60 | | 25w^2-9g^2= | | .75(4y-8)=6 | | 4u^2-15u+9=0 | | 10+2q+10=-10-4q | | -5a+54=5(-4a+13.88) | | x^2+y^2+2y=0 | | 6x^3+8x^2=14x | | -2.5-4x=11.9 | | 13+8m=-2+3m | | 8+2(3x-3)=-3(-4-2)+8 | | 4y-1+y+31=8y+30-6y | | 2(9x+10)=-5(-3x+8) | | h+4=-10-h | | 1.3+1.4q=-4.1 | | 4y-1+y+29=8y+30-6y | | 9+4(x-2)=4[9-5(x+4)] | | 2z^2+z+4=0 | | -2.9-4x=11.9 | | 2b-9=-b-6 | | (-7a)(-7a)(-7a)(-7a)= | | (9m-4)(8m^2-5m+5)= | | 5X-4+X+10=180 | | -3a+9+7a=9a-2a | | 4(1.7)+45=x | | 5w^2+w-4= |

Equations solver categories