4x-3x*x=15

Simple and best practice solution for 4x-3x*x=15 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 4x-3x*x=15 equation:


Simplifying
4x + -3x * x = 15

Multiply x * x
4x + -3x2 = 15

Solving
4x + -3x2 = 15

Solving for variable 'x'.

Reorder the terms:
-15 + 4x + -3x2 = 15 + -15

Combine like terms: 15 + -15 = 0
-15 + 4x + -3x2 = 0

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

Divide each side by '-3'.
5 + -1.333333333x + x2 = 0

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + -1.333333333x + -5 + x2 = 0 + -5

Reorder the terms:
5 + -5 + -1.333333333x + x2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -1.333333333x + x2 = 0 + -5
-1.333333333x + x2 = 0 + -5

Combine like terms: 0 + -5 = -5
-1.333333333x + x2 = -5

The x term is -1.333333333x.  Take half its coefficient (-0.6666666665).
Square it (0.4444444442) and add it to both sides.

Add '0.4444444442' to each side of the equation.
-1.333333333x + 0.4444444442 + x2 = -5 + 0.4444444442

Reorder the terms:
0.4444444442 + -1.333333333x + x2 = -5 + 0.4444444442

Combine like terms: -5 + 0.4444444442 = -4.5555555558
0.4444444442 + -1.333333333x + x2 = -4.5555555558

Factor a perfect square on the left side:
(x + -0.6666666665)(x + -0.6666666665) = -4.5555555558

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| -5x+1+3x=-19 | | x(2+5)=5+2x | | x^4-2x^3+4x^2-3x-10=0 | | Kx^2=1 | | 14x+6y+12+3x-10y-4= | | 2x+30+8x-6=180 | | N+10=40-1 | | 7x+70=10x | | z=6+4i | | 71+-5x=9x+-13 | | 28=.59x | | X=(14-2) | | X=(2-14) | | 1x+6=2x | | -.33x+5=-1x+7 | | 1x+6=2 | | 3-36*6+2= | | 6x-y-4x=5y | | 2z+4=3z-4 | | m+5m+6=0 | | 10x=2.1 | | 7.3k=6 | | Sin(x+30)=0.2 | | 4.3y=15 | | (x+4)(3x-9)=0 | | 4y-6=13 | | 2(x+7)-(3x-2)=3 | | -3+-14x= | | 16+6z=14 | | 7n^2-5=0 | | (3x-1)/4-(x+1)/2=(2x-5)/8 | | -3+-12x= |

Equations solver categories