6x^2-21x+20=0

Simple and best practice solution for 6x^2-21x+20=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 6x^2-21x+20=0 equation:


Simplifying
6x2 + -21x + 20 = 0

Reorder the terms:
20 + -21x + 6x2 = 0

Solving
20 + -21x + 6x2 = 0

Solving for variable 'x'.

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

Divide each side by '6'.
3.333333333 + -3.5x + x2 = 0

Move the constant term to the right:

Add '-3.333333333' to each side of the equation.
3.333333333 + -3.5x + -3.333333333 + x2 = 0 + -3.333333333

Reorder the terms:
3.333333333 + -3.333333333 + -3.5x + x2 = 0 + -3.333333333

Combine like terms: 3.333333333 + -3.333333333 = 0.000000000
0.000000000 + -3.5x + x2 = 0 + -3.333333333
-3.5x + x2 = 0 + -3.333333333

Combine like terms: 0 + -3.333333333 = -3.333333333
-3.5x + x2 = -3.333333333

The x term is -3.5x.  Take half its coefficient (-1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
-3.5x + 3.0625 + x2 = -3.333333333 + 3.0625

Reorder the terms:
3.0625 + -3.5x + x2 = -3.333333333 + 3.0625

Combine like terms: -3.333333333 + 3.0625 = -0.270833333
3.0625 + -3.5x + x2 = -0.270833333

Factor a perfect square on the left side:
(x + -1.75)(x + -1.75) = -0.270833333

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| x+2+28=x+1 | | A+12-8=26 | | 7x-7=x+11 | | 2x-15=3x-15 | | 9w+2=w+20 | | -[6x-(3x+1)]=-4-[4(2x-3)-3x] | | H(t)=-16t^2+33.1t+1.7 | | 7+b-8=12 | | m+7=3+4 | | 14-2(3x+6)= | | 6x-3y+37=11-y | | -g+2(3+g)=-4(g-4) | | 2[w-(2w+10)+8]=2(w+2) | | 5(y-2)=6(y-1) | | 3(2k+18)=6(9+k) | | 4x^2+56x+156=0 | | s=4s-60 | | 9x-20=7x+16 | | 140=(2x-2)(2x+2) | | 6(5-5y)= | | t^3+t=4930 | | 2z/2= | | 11+x+24=19+x+22 | | 0.75(4x+8)=-3 | | 5k-15+j=3j-5 | | 3(2g+7m)= | | (x+x)-20x+100=0 | | 0.2r=-8 | | v+53=3v+21 | | 9=5.4*x | | 5y^2+7y-4=0 | | 12-4p=-4(-5p-3) |

Equations solver categories