x(x-3)=-1

Simple and best practice solution for x(x-3)=-1 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(x-3)=-1 equation:


Simplifying
x(x + -3) = -1

Reorder the terms:
x(-3 + x) = -1
(-3 * x + x * x) = -1
(-3x + x2) = -1

Solving
-3x + x2 = -1

Solving for variable 'x'.

Reorder the terms:
1 + -3x + x2 = -1 + 1

Combine like terms: -1 + 1 = 0
1 + -3x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + -3x + -1 + x2 = 0 + -1

Reorder the terms:
1 + -1 + -3x + x2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -3x + x2 = 0 + -1
-3x + x2 = 0 + -1

Combine like terms: 0 + -1 = -1
-3x + x2 = -1

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 + 2.25

Reorder the terms:
2.25 + -3x + x2 = -1 + 2.25

Combine like terms: -1 + 2.25 = 1.25
2.25 + -3x + x2 = 1.25

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 1.25

Calculate the square root of the right side: 1.118033989

Break this problem into two subproblems by setting 
(x + -1.5) equal to 1.118033989 and -1.118033989.

Subproblem 1

x + -1.5 = 1.118033989 Simplifying x + -1.5 = 1.118033989 Reorder the terms: -1.5 + x = 1.118033989 Solving -1.5 + x = 1.118033989 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 = 1.118033989 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 1.118033989 + 1.5 x = 1.118033989 + 1.5 Combine like terms: 1.118033989 + 1.5 = 2.618033989 x = 2.618033989 Simplifying x = 2.618033989

Subproblem 2

x + -1.5 = -1.118033989 Simplifying x + -1.5 = -1.118033989 Reorder the terms: -1.5 + x = -1.118033989 Solving -1.5 + x = -1.118033989 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 = -1.118033989 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -1.118033989 + 1.5 x = -1.118033989 + 1.5 Combine like terms: -1.118033989 + 1.5 = 0.381966011 x = 0.381966011 Simplifying x = 0.381966011

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.618033989, 0.381966011}

See similar equations:

| H=50+34t | | 16x-24=26+6x | | 0.5x+0.7=11.7 | | (-4.2)(-6.4)= | | 4[3+5(3-b)+2b]=6-2b | | 3y=3y | | (4b+5f)*(4b-5f)= | | 2-4x=8-x | | (4b+5f)(4b-5f)= | | 20*(1/10+1/5)=6 | | 20*(1/10+1/5)= | | 9-6x=4(2.5x-2x) | | 65=67 | | graphy=2x+3 | | 3(3-2x)+4=5(x-4)-6+2x | | s-5= | | 19x-13+8x+34= | | 5*3x+(9-12)=10 | | (x+2y-1)dx+3(x+2y)dy=0 | | g(x)=2x^5+5x^4+3x^3+16x^2+4x+8 | | x^2+x=-5 | | 6x-7=13x | | -.5b=-8 | | 13c+40=8c-20 | | .75t=-15 | | 24*(1/2+x)=4 | | x^2-155x+(2135.71)= | | 8(4+x)=2x+65 | | -.75z=-5.5 | | n-2=13+6n | | .25x=.25-0.375x | | -5*(19+x)=0 |

Equations solver categories