12x^2-39x+40=0

Simple and best practice solution for 12x^2-39x+40=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 12x^2-39x+40=0 equation:


Simplifying
12x2 + -39x + 40 = 0

Reorder the terms:
40 + -39x + 12x2 = 0

Solving
40 + -39x + 12x2 = 0

Solving for variable 'x'.

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

Divide each side by '12'.
3.333333333 + -3.25x + x2 = 0

Move the constant term to the right:

Add '-3.333333333' to each side of the equation.
3.333333333 + -3.25x + -3.333333333 + x2 = 0 + -3.333333333

Reorder the terms:
3.333333333 + -3.333333333 + -3.25x + x2 = 0 + -3.333333333

Combine like terms: 3.333333333 + -3.333333333 = 0.000000000
0.000000000 + -3.25x + x2 = 0 + -3.333333333
-3.25x + x2 = 0 + -3.333333333

Combine like terms: 0 + -3.333333333 = -3.333333333
-3.25x + x2 = -3.333333333

The x term is -3.25x.  Take half its coefficient (-1.625).
Square it (2.640625) and add it to both sides.

Add '2.640625' to each side of the equation.
-3.25x + 2.640625 + x2 = -3.333333333 + 2.640625

Reorder the terms:
2.640625 + -3.25x + x2 = -3.333333333 + 2.640625

Combine like terms: -3.333333333 + 2.640625 = -0.692708333
2.640625 + -3.25x + x2 = -0.692708333

Factor a perfect square on the left side:
(x + -1.625)(x + -1.625) = -0.692708333

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 2(3x+2)=-32 | | 4z^4-4z^3+5z^2-4z+1=0 | | 1200=1.5x+1.5x+x | | -6D+1=4D+21 | | 6x^2+60x+150=0 | | 20=9x+2 | | 3[2x+3(2x+1)]=105 | | 7(7-6)2= | | y=-3+9 | | 3(2-7)+6= | | (4x+9)(3x^2+4x+2)= | | -2(5v-7)=-8(v+2) | | 8=2(1+1) | | 8x=60 | | 3x-3.2=2.8 | | 7x+3(x-7)-4(x-7)= | | 8y+20+3y+3=34 | | 6(-11)-5(3)= | | 4x^2+6x-9x^2=7 | | y/4=8/16 | | 15x+2=16x-3 | | -16a=75-a | | (8x+4)2=-40 | | 5x+1=6x-5 | | (5x+6)(2x-1)=0 | | 5x(7)+10x(6)-15x(5)+10x(4)= | | 4x^2-101x+25=0 | | (4x+3)(3y-8)=0 | | 3y+2=2 | | 20-3= | | y^2-x^2+2y-2x+1=0 | | 2x+x=18 |

Equations solver categories