7n^2-4n-17=0

Simple and best practice solution for 7n^2-4n-17=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 7n^2-4n-17=0 equation:


Simplifying
7n2 + -4n + -17 = 0

Reorder the terms:
-17 + -4n + 7n2 = 0

Solving
-17 + -4n + 7n2 = 0

Solving for variable 'n'.

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

Divide each side by '7'.
-2.428571429 + -0.5714285714n + n2 = 0

Move the constant term to the right:

Add '2.428571429' to each side of the equation.
-2.428571429 + -0.5714285714n + 2.428571429 + n2 = 0 + 2.428571429

Reorder the terms:
-2.428571429 + 2.428571429 + -0.5714285714n + n2 = 0 + 2.428571429

Combine like terms: -2.428571429 + 2.428571429 = 0.000000000
0.000000000 + -0.5714285714n + n2 = 0 + 2.428571429
-0.5714285714n + n2 = 0 + 2.428571429

Combine like terms: 0 + 2.428571429 = 2.428571429
-0.5714285714n + n2 = 2.428571429

The n term is -0.5714285714n.  Take half its coefficient (-0.2857142857).
Square it (0.08163265305) and add it to both sides.

Add '0.08163265305' to each side of the equation.
-0.5714285714n + 0.08163265305 + n2 = 2.428571429 + 0.08163265305

Reorder the terms:
0.08163265305 + -0.5714285714n + n2 = 2.428571429 + 0.08163265305

Combine like terms: 2.428571429 + 0.08163265305 = 2.51020408205
0.08163265305 + -0.5714285714n + n2 = 2.51020408205

Factor a perfect square on the left side:
(n + -0.2857142857)(n + -0.2857142857) = 2.51020408205

Calculate the square root of the right side: 1.584362358

Break this problem into two subproblems by setting 
(n + -0.2857142857) equal to 1.584362358 and -1.584362358.

Subproblem 1

n + -0.2857142857 = 1.584362358 Simplifying n + -0.2857142857 = 1.584362358 Reorder the terms: -0.2857142857 + n = 1.584362358 Solving -0.2857142857 + n = 1.584362358 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.2857142857' to each side of the equation. -0.2857142857 + 0.2857142857 + n = 1.584362358 + 0.2857142857 Combine like terms: -0.2857142857 + 0.2857142857 = 0.0000000000 0.0000000000 + n = 1.584362358 + 0.2857142857 n = 1.584362358 + 0.2857142857 Combine like terms: 1.584362358 + 0.2857142857 = 1.8700766437 n = 1.8700766437 Simplifying n = 1.8700766437

Subproblem 2

n + -0.2857142857 = -1.584362358 Simplifying n + -0.2857142857 = -1.584362358 Reorder the terms: -0.2857142857 + n = -1.584362358 Solving -0.2857142857 + n = -1.584362358 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.2857142857' to each side of the equation. -0.2857142857 + 0.2857142857 + n = -1.584362358 + 0.2857142857 Combine like terms: -0.2857142857 + 0.2857142857 = 0.0000000000 0.0000000000 + n = -1.584362358 + 0.2857142857 n = -1.584362358 + 0.2857142857 Combine like terms: -1.584362358 + 0.2857142857 = -1.2986480723 n = -1.2986480723 Simplifying n = -1.2986480723

Solution

The solution to the problem is based on the solutions from the subproblems. n = {1.8700766437, -1.2986480723}

See similar equations:

| 7+2y=-13 | | 3x+33=84 | | c=2(3.14)32 | | Y+5=-6(x-1) | | 5*3-8/2*3 | | 4n-5=n+25 | | -2(b+5)=12+b | | -7x+5(-4x+17)=-185 | | 8b+16-2b=4b | | -5x+5=19+2x | | m-7=3m-1 | | 175=123-y | | 12mn-4m^2-9n^2=0 | | -3+-7g+7+-7= | | x^4-x^3-x^2-5x-2=0 | | 243.80=.65y+.75x | | -160=7x-3(6x+13) | | 4m-3=5m-9 | | 7x+-19y=-17 | | y=6000x | | 3y+9=12y+13 | | -147=-7x+7(5x+3) | | 4(X-6)-1=31 | | 2u-7=-11 | | 2m+15=-27 | | -4K-3=-7 | | 6(7-4x)=6(-6x+3) | | 2(d-9)+4= | | 2×=1/2x-7 | | 24=-6x+2(2x+4) | | ln(25x+1)-ln(x+2)=0 | | 15a^2/5a^4 |

Equations solver categories