8n^2+3n-13=0

Simple and best practice solution for 8n^2+3n-13=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 8n^2+3n-13=0 equation:


Simplifying
8n2 + 3n + -13 = 0

Reorder the terms:
-13 + 3n + 8n2 = 0

Solving
-13 + 3n + 8n2 = 0

Solving for variable 'n'.

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

Divide each side by '8'.
-1.625 + 0.375n + n2 = 0

Move the constant term to the right:

Add '1.625' to each side of the equation.
-1.625 + 0.375n + 1.625 + n2 = 0 + 1.625

Reorder the terms:
-1.625 + 1.625 + 0.375n + n2 = 0 + 1.625

Combine like terms: -1.625 + 1.625 = 0.000
0.000 + 0.375n + n2 = 0 + 1.625
0.375n + n2 = 0 + 1.625

Combine like terms: 0 + 1.625 = 1.625
0.375n + n2 = 1.625

The n term is 0.375n.  Take half its coefficient (0.1875).
Square it (0.03515625) and add it to both sides.

Add '0.03515625' to each side of the equation.
0.375n + 0.03515625 + n2 = 1.625 + 0.03515625

Reorder the terms:
0.03515625 + 0.375n + n2 = 1.625 + 0.03515625

Combine like terms: 1.625 + 0.03515625 = 1.66015625
0.03515625 + 0.375n + n2 = 1.66015625

Factor a perfect square on the left side:
(n + 0.1875)(n + 0.1875) = 1.66015625

Calculate the square root of the right side: 1.288470508

Break this problem into two subproblems by setting 
(n + 0.1875) equal to 1.288470508 and -1.288470508.

Subproblem 1

n + 0.1875 = 1.288470508 Simplifying n + 0.1875 = 1.288470508 Reorder the terms: 0.1875 + n = 1.288470508 Solving 0.1875 + n = 1.288470508 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.1875' to each side of the equation. 0.1875 + -0.1875 + n = 1.288470508 + -0.1875 Combine like terms: 0.1875 + -0.1875 = 0.0000 0.0000 + n = 1.288470508 + -0.1875 n = 1.288470508 + -0.1875 Combine like terms: 1.288470508 + -0.1875 = 1.100970508 n = 1.100970508 Simplifying n = 1.100970508

Subproblem 2

n + 0.1875 = -1.288470508 Simplifying n + 0.1875 = -1.288470508 Reorder the terms: 0.1875 + n = -1.288470508 Solving 0.1875 + n = -1.288470508 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.1875' to each side of the equation. 0.1875 + -0.1875 + n = -1.288470508 + -0.1875 Combine like terms: 0.1875 + -0.1875 = 0.0000 0.0000 + n = -1.288470508 + -0.1875 n = -1.288470508 + -0.1875 Combine like terms: -1.288470508 + -0.1875 = -1.475970508 n = -1.475970508 Simplifying n = -1.475970508

Solution

The solution to the problem is based on the solutions from the subproblems. n = {1.100970508, -1.475970508}

See similar equations:

| 25=6x-8 | | 3(m+8)=30 | | 7(x+3)=7x+5 | | 3/5x=7(1/2) | | 6x-8=25 | | 8g^3+343=0 | | x-5.1= | | y=3y+0 | | -4+10-3y=6 | | -15+2x=-10x-18+13x+4x-17 | | 7x+10=4x+7 | | -3/2(8x-10)=-20 | | x+4.63=9.52 | | 180-x=53-y | | 3x+y^2=60 | | -4+v=-2 | | 9(x+11)=83 | | 0.4(5-0.4n)=-3.2n | | 6x^2/3-41x^1/3-7=0 | | -4x^2+29+14=0 | | 4(x+6)=4x+8 | | 6(a-8)=A(7-4) | | x-3.5=8.7 | | 3s+4r+6+13+4s= | | 5x^2+8x-30= | | 6x+2y+7=180 | | 10=7x+6-3x | | 2x1/9 | | -4(6+x)+3=-13 | | (2x+12)=(3x+18) | | 4=4z-72 | | 4z-17=z+4 |

Equations solver categories