x(3-x)=8

Simple and best practice solution for x(3-x)=8 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(3-x)=8 equation:


Simplifying
x(3 + -1x) = 8
(3 * x + -1x * x) = 8
(3x + -1x2) = 8

Solving
3x + -1x2 = 8

Solving for variable 'x'.

Reorder the terms:
-8 + 3x + -1x2 = 8 + -8

Combine like terms: 8 + -8 = 0
-8 + 3x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
8 + -3x + x2 = 0

Move the constant term to the right:

Add '-8' to each side of the equation.
8 + -3x + -8 + x2 = 0 + -8

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

Combine like terms: 8 + -8 = 0
0 + -3x + x2 = 0 + -8
-3x + x2 = 0 + -8

Combine like terms: 0 + -8 = -8
-3x + x2 = -8

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 = -8 + 2.25

Reorder the terms:
2.25 + -3x + x2 = -8 + 2.25

Combine like terms: -8 + 2.25 = -5.75
2.25 + -3x + x2 = -5.75

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = -5.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 5x+60=(2x-10)(2x-10) | | 3y-8=6y+7 | | 2(4.5+-1.5y)+3y=9 | | 2x+2(x-1)=3 | | 54=3x^4+3x | | 4-7n=-4(n+5) | | 3.4x-0.88=1.36-2.2 | | 2(3-4x)=5x-85 | | 4-86=-322 | | 3.6-12n=2.8(n-5) | | 3*x^2-4x+53=0 | | -4(5-r)=12 | | 3*x^2-4x+0=0 | | 35+b=-9 | | (x+5)(x-1)=x-7 | | -2lx-2l+10=2 | | 3x+5y=xy | | 3t^2-4t-39=0 | | x-6+22=212y | | 2xy^2=4x^2y^2 | | x-6+22=212 | | 2(8-5p)=-p-38 | | 66*x-6+22=212*66 | | 66*x-6+22=212*2 | | 5t-4=6t-9 | | 2*x-6+22=212*2 | | -5.62+1.4x= | | x-6+2=212*2 | | 6(x+17)=1068 | | 4*w=20 | | -5-8x=-3(-7x-8) | | -3(y+1)=9-2y |

Equations solver categories