n^2-2n-3=6

Simple and best practice solution for n^2-2n-3=6 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 n^2-2n-3=6 equation:


Simplifying
n2 + -2n + -3 = 6

Reorder the terms:
-3 + -2n + n2 = 6

Solving
-3 + -2n + n2 = 6

Solving for variable 'n'.

Reorder the terms:
-3 + -6 + -2n + n2 = 6 + -6

Combine like terms: -3 + -6 = -9
-9 + -2n + n2 = 6 + -6

Combine like terms: 6 + -6 = 0
-9 + -2n + n2 = 0

Begin completing the square.

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + -2n + 9 + n2 = 0 + 9

Reorder the terms:
-9 + 9 + -2n + n2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -2n + n2 = 0 + 9
-2n + n2 = 0 + 9

Combine like terms: 0 + 9 = 9
-2n + n2 = 9

The n term is -2n.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2n + 1 + n2 = 9 + 1

Reorder the terms:
1 + -2n + n2 = 9 + 1

Combine like terms: 9 + 1 = 10
1 + -2n + n2 = 10

Factor a perfect square on the left side:
(n + -1)(n + -1) = 10

Calculate the square root of the right side: 3.16227766

Break this problem into two subproblems by setting 
(n + -1) equal to 3.16227766 and -3.16227766.

Subproblem 1

n + -1 = 3.16227766 Simplifying n + -1 = 3.16227766 Reorder the terms: -1 + n = 3.16227766 Solving -1 + n = 3.16227766 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + n = 3.16227766 + 1 Combine like terms: -1 + 1 = 0 0 + n = 3.16227766 + 1 n = 3.16227766 + 1 Combine like terms: 3.16227766 + 1 = 4.16227766 n = 4.16227766 Simplifying n = 4.16227766

Subproblem 2

n + -1 = -3.16227766 Simplifying n + -1 = -3.16227766 Reorder the terms: -1 + n = -3.16227766 Solving -1 + n = -3.16227766 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + n = -3.16227766 + 1 Combine like terms: -1 + 1 = 0 0 + n = -3.16227766 + 1 n = -3.16227766 + 1 Combine like terms: -3.16227766 + 1 = -2.16227766 n = -2.16227766 Simplifying n = -2.16227766

Solution

The solution to the problem is based on the solutions from the subproblems. n = {4.16227766, -2.16227766}

See similar equations:

| x^2+6x=130 | | (3+2i)(3+2i)=0 | | 10m=k^2 | | 4g+3=23 | | X^2+5-104=0 | | 3n=30-3 | | x=48 | | 6x^3-13x^2-8x= | | 14=-16t^2+24t+6 | | g(b+6)=7x-2 | | 2+m=3 | | -2h+5=5h-44 | | N^2+10=-5n | | 5n=26+4 | | 6x=11x^2 | | -5h+6=41 | | x-10+x+30=120 | | 3x+=5x-1 | | 2(7x-55)=7x-20-2x | | x-10=120 | | 4x+2(x+5)-3x=3x+20 | | 0=x^2-8x-4 | | g(7b)=7x-2 | | -3=-t^3+5t^2-2t | | 6x+17+x=-74 | | sin(5x)+cos(5x)=0 | | x*z=y*z | | 9=t^3-5t^2+2t | | 16-5(2m+8)= | | 5(3y-24)+8y=-5 | | cos(3x)+sin(2x)=0 | | 6(7x+2)=-(4-5x) |

Equations solver categories