5n^2-2n-12=0

Simple and best practice solution for 5n^2-2n-12=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 5n^2-2n-12=0 equation:


Simplifying
5n2 + -2n + -12 = 0

Reorder the terms:
-12 + -2n + 5n2 = 0

Solving
-12 + -2n + 5n2 = 0

Solving for variable 'n'.

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

Divide each side by '5'.
-2.4 + -0.4n + n2 = 0

Move the constant term to the right:

Add '2.4' to each side of the equation.
-2.4 + -0.4n + 2.4 + n2 = 0 + 2.4

Reorder the terms:
-2.4 + 2.4 + -0.4n + n2 = 0 + 2.4

Combine like terms: -2.4 + 2.4 = 0.0
0.0 + -0.4n + n2 = 0 + 2.4
-0.4n + n2 = 0 + 2.4

Combine like terms: 0 + 2.4 = 2.4
-0.4n + n2 = 2.4

The n term is -0.4n.  Take half its coefficient (-0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
-0.4n + 0.04 + n2 = 2.4 + 0.04

Reorder the terms:
0.04 + -0.4n + n2 = 2.4 + 0.04

Combine like terms: 2.4 + 0.04 = 2.44
0.04 + -0.4n + n2 = 2.44

Factor a perfect square on the left side:
(n + -0.2)(n + -0.2) = 2.44

Calculate the square root of the right side: 1.562049935

Break this problem into two subproblems by setting 
(n + -0.2) equal to 1.562049935 and -1.562049935.

Subproblem 1

n + -0.2 = 1.562049935 Simplifying n + -0.2 = 1.562049935 Reorder the terms: -0.2 + n = 1.562049935 Solving -0.2 + n = 1.562049935 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.2' to each side of the equation. -0.2 + 0.2 + n = 1.562049935 + 0.2 Combine like terms: -0.2 + 0.2 = 0.0 0.0 + n = 1.562049935 + 0.2 n = 1.562049935 + 0.2 Combine like terms: 1.562049935 + 0.2 = 1.762049935 n = 1.762049935 Simplifying n = 1.762049935

Subproblem 2

n + -0.2 = -1.562049935 Simplifying n + -0.2 = -1.562049935 Reorder the terms: -0.2 + n = -1.562049935 Solving -0.2 + n = -1.562049935 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.2' to each side of the equation. -0.2 + 0.2 + n = -1.562049935 + 0.2 Combine like terms: -0.2 + 0.2 = 0.0 0.0 + n = -1.562049935 + 0.2 n = -1.562049935 + 0.2 Combine like terms: -1.562049935 + 0.2 = -1.362049935 n = -1.362049935 Simplifying n = -1.362049935

Solution

The solution to the problem is based on the solutions from the subproblems. n = {1.762049935, -1.362049935}

See similar equations:

| 1x/10=1 | | 4(4x+2)=18x+5-2x+3 | | 10=n+19 | | 12/5f=-8 | | 98+5x+6+y-9=180 | | (1-5q)+2(2.5+8)=0 | | 10x-109=99-3x | | 1x/10=6 | | 4+4(9x+2)= | | 1/3•1d-4=0 | | 9(6b-8)=24+4b | | 1-(x/3)= | | 11x^2-9x-9=0 | | 5x-54= | | 16y-20=10y+22 | | 1-(x/3) | | -33=-2+3(k-9) | | 11x+2x=338 | | 5x+2=4(x+2) | | 4r+-8(r-4)=24 | | 2(x+12)+x=180 | | 120x-.4x^4+1100=0 | | x+6-9=37 | | 5c-4c=-20 | | 788-00004456723+0900087113= | | 57=k-4 | | x^2+2016x+2017=0 | | 4t^2-t-4=0 | | 9x+11y=65 | | -30=-8a-7a | | -2(3y-7)=58 | | -2x-1/2x |

Equations solver categories