5n^2=8n-2

Simple and best practice solution for 5n^2=8n-2 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=8n-2 equation:


Simplifying
5n2 = 8n + -2

Reorder the terms:
5n2 = -2 + 8n

Solving
5n2 = -2 + 8n

Solving for variable 'n'.

Reorder the terms:
2 + -8n + 5n2 = -2 + 8n + 2 + -8n

Reorder the terms:
2 + -8n + 5n2 = -2 + 2 + 8n + -8n

Combine like terms: -2 + 2 = 0
2 + -8n + 5n2 = 0 + 8n + -8n
2 + -8n + 5n2 = 8n + -8n

Combine like terms: 8n + -8n = 0
2 + -8n + 5n2 = 0

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

Divide each side by '5'.
0.4 + -1.6n + n2 = 0

Move the constant term to the right:

Add '-0.4' to each side of the equation.
0.4 + -1.6n + -0.4 + n2 = 0 + -0.4

Reorder the terms:
0.4 + -0.4 + -1.6n + n2 = 0 + -0.4

Combine like terms: 0.4 + -0.4 = 0.0
0.0 + -1.6n + n2 = 0 + -0.4
-1.6n + n2 = 0 + -0.4

Combine like terms: 0 + -0.4 = -0.4
-1.6n + n2 = -0.4

The n term is -1.6n.  Take half its coefficient (-0.8).
Square it (0.64) and add it to both sides.

Add '0.64' to each side of the equation.
-1.6n + 0.64 + n2 = -0.4 + 0.64

Reorder the terms:
0.64 + -1.6n + n2 = -0.4 + 0.64

Combine like terms: -0.4 + 0.64 = 0.24
0.64 + -1.6n + n2 = 0.24

Factor a perfect square on the left side:
(n + -0.8)(n + -0.8) = 0.24

Calculate the square root of the right side: 0.489897949

Break this problem into two subproblems by setting 
(n + -0.8) equal to 0.489897949 and -0.489897949.

Subproblem 1

n + -0.8 = 0.489897949 Simplifying n + -0.8 = 0.489897949 Reorder the terms: -0.8 + n = 0.489897949 Solving -0.8 + n = 0.489897949 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.8' to each side of the equation. -0.8 + 0.8 + n = 0.489897949 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + n = 0.489897949 + 0.8 n = 0.489897949 + 0.8 Combine like terms: 0.489897949 + 0.8 = 1.289897949 n = 1.289897949 Simplifying n = 1.289897949

Subproblem 2

n + -0.8 = -0.489897949 Simplifying n + -0.8 = -0.489897949 Reorder the terms: -0.8 + n = -0.489897949 Solving -0.8 + n = -0.489897949 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.8' to each side of the equation. -0.8 + 0.8 + n = -0.489897949 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + n = -0.489897949 + 0.8 n = -0.489897949 + 0.8 Combine like terms: -0.489897949 + 0.8 = 0.310102051 n = 0.310102051 Simplifying n = 0.310102051

Solution

The solution to the problem is based on the solutions from the subproblems. n = {1.289897949, 0.310102051}

See similar equations:

| 15x(7x+6)=11-(x-10) | | 2ln(x)=xln(2e) | | 5x+14+4x=31 | | (x-5)(x+6)+(x-5)(2x+5)= | | 8(-22x-4)+12=-52 | | ln(x)/x=0 | | -a^3+3a^2-5a= | | 23+40=5 | | 44+33=17 | | 44+31=17 | | 5x-14-4x=31 | | 46+33=17 | | (z-8)/16=10/4 | | ax+bx+c=y | | x=40000+.2x | | 4x-15x+65=32 | | 3(2x-8)=9x-12x-6x | | 5x-2x+8=2(4x+34) | | -1/2*-1/3= | | 5x+42=x+18 | | -1/2*-1/3 | | 4x+8-2x=2 | | 1x(1+1)=30 | | 5x+6x-5=94 | | 0.12=.05+b(.10-.05) | | -2s*s= | | g(g+6)-2(g+6)=0 | | 7m-4=20m | | 5x-2x+6x=3x-12 | | sqrtx-2=4-x | | -4/3(x-4)^-1/3=0 | | 2(5x-1)=-(3x-24) |

Equations solver categories