3n^2-22n+84=0

Simple and best practice solution for 3n^2-22n+84=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 3n^2-22n+84=0 equation:


Simplifying
3n2 + -22n + 84 = 0

Reorder the terms:
84 + -22n + 3n2 = 0

Solving
84 + -22n + 3n2 = 0

Solving for variable 'n'.

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

Divide each side by '3'.
28 + -7.333333333n + n2 = 0

Move the constant term to the right:

Add '-28' to each side of the equation.
28 + -7.333333333n + -28 + n2 = 0 + -28

Reorder the terms:
28 + -28 + -7.333333333n + n2 = 0 + -28

Combine like terms: 28 + -28 = 0
0 + -7.333333333n + n2 = 0 + -28
-7.333333333n + n2 = 0 + -28

Combine like terms: 0 + -28 = -28
-7.333333333n + n2 = -28

The n term is -7.333333333n.  Take half its coefficient (-3.666666667).
Square it (13.44444445) and add it to both sides.

Add '13.44444445' to each side of the equation.
-7.333333333n + 13.44444445 + n2 = -28 + 13.44444445

Reorder the terms:
13.44444445 + -7.333333333n + n2 = -28 + 13.44444445

Combine like terms: -28 + 13.44444445 = -14.55555555
13.44444445 + -7.333333333n + n2 = -14.55555555

Factor a perfect square on the left side:
(n + -3.666666667)(n + -3.666666667) = -14.55555555

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 50r^2-18= | | (7k^2)-6k+0=0 | | 8a^5b^3+27a^8= | | 4x-3(x+5)=16-7(x+1) | | 0=3x^2-12x+20 | | 6(8x-4)=9x-3 | | (6b^2)-13b+6=0 | | 5x-10+6=7x+18-5x | | y=3/4*2/4 | | 23t^2-54t+16=0 | | 4.08/.048= | | y+9x=3 | | 413=-7(8a+5) | | 3x^2-y^2+12x-14y-40=0 | | 1=3-5x | | 2b-3.4/0.6=-29 | | -4x=2x+9 | | 4x^6-20x^4+24x^2=0 | | 9g+5-2g=12+10g-6 | | 8x^2-34x+13=0 | | 2x+2=12x-21 | | (9p-8)(9p-8)=-2(9p-8)+15 | | -6(-5+4)= | | -153=-1-4(8+5x) | | 13=-3n-17 | | 3a+5b-3a-b= | | 2x^2+18x-2=0 | | 0.25a-12/8=4 | | -(p-2)=8-2p | | x^2-10x+45=8120 | | 1.5x+1=-3.3 | | x^2-10x+45= |

Equations solver categories