9n+4+9n+4+3n^2-0.75=180

Simple and best practice solution for 9n+4+9n+4+3n^2-0.75=180 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 9n+4+9n+4+3n^2-0.75=180 equation:


Simplifying
9n + 4 + 9n + 4 + 3n2 + -0.75 = 180

Reorder the terms:
4 + 4 + -0.75 + 9n + 9n + 3n2 = 180

Combine like terms: 4 + 4 = 8
8 + -0.75 + 9n + 9n + 3n2 = 180

Combine like terms: 8 + -0.75 = 7.25
7.25 + 9n + 9n + 3n2 = 180

Combine like terms: 9n + 9n = 18n
7.25 + 18n + 3n2 = 180

Solving
7.25 + 18n + 3n2 = 180

Solving for variable 'n'.

Reorder the terms:
7.25 + -180 + 18n + 3n2 = 180 + -180

Combine like terms: 7.25 + -180 = -172.75
-172.75 + 18n + 3n2 = 180 + -180

Combine like terms: 180 + -180 = 0
-172.75 + 18n + 3n2 = 0

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

Divide each side by '3'.
-57.58333333 + 6n + n2 = 0

Move the constant term to the right:

Add '57.58333333' to each side of the equation.
-57.58333333 + 6n + 57.58333333 + n2 = 0 + 57.58333333

Reorder the terms:
-57.58333333 + 57.58333333 + 6n + n2 = 0 + 57.58333333

Combine like terms: -57.58333333 + 57.58333333 = 0.00000000
0.00000000 + 6n + n2 = 0 + 57.58333333
6n + n2 = 0 + 57.58333333

Combine like terms: 0 + 57.58333333 = 57.58333333
6n + n2 = 57.58333333

The n term is 6n.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6n + 9 + n2 = 57.58333333 + 9

Reorder the terms:
9 + 6n + n2 = 57.58333333 + 9

Combine like terms: 57.58333333 + 9 = 66.58333333
9 + 6n + n2 = 66.58333333

Factor a perfect square on the left side:
(n + 3)(n + 3) = 66.58333333

Calculate the square root of the right side: 8.15986111

Break this problem into two subproblems by setting 
(n + 3) equal to 8.15986111 and -8.15986111.

Subproblem 1

n + 3 = 8.15986111 Simplifying n + 3 = 8.15986111 Reorder the terms: 3 + n = 8.15986111 Solving 3 + n = 8.15986111 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + n = 8.15986111 + -3 Combine like terms: 3 + -3 = 0 0 + n = 8.15986111 + -3 n = 8.15986111 + -3 Combine like terms: 8.15986111 + -3 = 5.15986111 n = 5.15986111 Simplifying n = 5.15986111

Subproblem 2

n + 3 = -8.15986111 Simplifying n + 3 = -8.15986111 Reorder the terms: 3 + n = -8.15986111 Solving 3 + n = -8.15986111 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + n = -8.15986111 + -3 Combine like terms: 3 + -3 = 0 0 + n = -8.15986111 + -3 n = -8.15986111 + -3 Combine like terms: -8.15986111 + -3 = -11.15986111 n = -11.15986111 Simplifying n = -11.15986111

Solution

The solution to the problem is based on the solutions from the subproblems. n = {5.15986111, -11.15986111}

See similar equations:

| P^2-6p-10=6 | | 6x=-9x+15 | | 3.75x+25=3.75+25 | | -4k-5k=-9 | | 7x+9.31=4x+13 | | 8-7x=-3x-9 | | 1/6y-1=x | | -33=10-10A | | 6x=-9+15 | | lmP=-5 | | 3z-1=3z-6 | | (X-5)/2=(x-2)/3 | | 9x-2x-4=2x+7 | | 3z-1=3x-6 | | 3x+2x-5=78 | | -3.8x+1.3=-17.7 | | 11(v+4)-3v=4(2v+1)-11 | | 2y+(1)=8 | | y-5=6(x+2) | | 18c^4+57c^3-10c^2= | | 2m^2+6m+4=0 | | 6y-7=17-4y+7y | | 5x-3(2x+4)=-(3x+2)+2 | | x+5.8=2 | | Cos^2x-cost-2=0 | | J=s(1-dn) | | 4f+8=6+31 | | 5.4x=-26.46 | | 7y+2=3y | | 6x+5=2x-10 | | 10C-9=-29 | | X^2+14x+44=-4 |

Equations solver categories