2n^2-6n=5

Simple and best practice solution for 2n^2-6n=5 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 2n^2-6n=5 equation:


Simplifying
2n2 + -6n = 5

Reorder the terms:
-6n + 2n2 = 5

Solving
-6n + 2n2 = 5

Solving for variable 'n'.

Reorder the terms:
-5 + -6n + 2n2 = 5 + -5

Combine like terms: 5 + -5 = 0
-5 + -6n + 2n2 = 0

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

Divide each side by '2'.
-2.5 + -3n + n2 = 0

Move the constant term to the right:

Add '2.5' to each side of the equation.
-2.5 + -3n + 2.5 + n2 = 0 + 2.5

Reorder the terms:
-2.5 + 2.5 + -3n + n2 = 0 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0
0.0 + -3n + n2 = 0 + 2.5
-3n + n2 = 0 + 2.5

Combine like terms: 0 + 2.5 = 2.5
-3n + n2 = 2.5

The n term is -3n.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3n + 2.25 + n2 = 2.5 + 2.25

Reorder the terms:
2.25 + -3n + n2 = 2.5 + 2.25

Combine like terms: 2.5 + 2.25 = 4.75
2.25 + -3n + n2 = 4.75

Factor a perfect square on the left side:
(n + -1.5)(n + -1.5) = 4.75

Calculate the square root of the right side: 2.179449472

Break this problem into two subproblems by setting 
(n + -1.5) equal to 2.179449472 and -2.179449472.

Subproblem 1

n + -1.5 = 2.179449472 Simplifying n + -1.5 = 2.179449472 Reorder the terms: -1.5 + n = 2.179449472 Solving -1.5 + n = 2.179449472 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + n = 2.179449472 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + n = 2.179449472 + 1.5 n = 2.179449472 + 1.5 Combine like terms: 2.179449472 + 1.5 = 3.679449472 n = 3.679449472 Simplifying n = 3.679449472

Subproblem 2

n + -1.5 = -2.179449472 Simplifying n + -1.5 = -2.179449472 Reorder the terms: -1.5 + n = -2.179449472 Solving -1.5 + n = -2.179449472 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + n = -2.179449472 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + n = -2.179449472 + 1.5 n = -2.179449472 + 1.5 Combine like terms: -2.179449472 + 1.5 = -0.679449472 n = -0.679449472 Simplifying n = -0.679449472

Solution

The solution to the problem is based on the solutions from the subproblems. n = {3.679449472, -0.679449472}

See similar equations:

| a*2+3/3= | | 4+7+9/5*8*3= | | 20x+12y=900 | | x+5=100 | | 5x+6+4x=3(3x+2) | | 4-6x=2x+52 | | 2x+5=6x+1 | | 2y+3=3 | | 2y+3=9 | | 10-5x=4x-44 | | 30-7h=10h-4 | | 3x+29=13x-71 | | 4p^2+24p=5 | | 5x+7=3+7x | | 6v=4(v+5) | | 3t+4=36 | | 7-90=2 | | 3x+3=6x-3 | | 2x*34-8=3 | | 4-2x=x+7 | | 2x-56=x | | 4m-2=2(2m-1) | | -3x-2=-38+6x | | 3t+4=4 | | 13+x=34 | | 7+2x=-5x-35 | | 7x-6y-9=0 | | 8=-5-2x | | 9-2x=-4x+5 | | 16=-8x | | lnx+ln(x+9)=2 | | 4(b-7)=7b+11 |

Equations solver categories