4n^2-n-7=0

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


Simplifying
4n2 + -1n + -7 = 0

Reorder the terms:
-7 + -1n + 4n2 = 0

Solving
-7 + -1n + 4n2 = 0

Solving for variable 'n'.

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

Divide each side by '4'.
-1.75 + -0.25n + n2 = 0

Move the constant term to the right:

Add '1.75' to each side of the equation.
-1.75 + -0.25n + 1.75 + n2 = 0 + 1.75

Reorder the terms:
-1.75 + 1.75 + -0.25n + n2 = 0 + 1.75

Combine like terms: -1.75 + 1.75 = 0.00
0.00 + -0.25n + n2 = 0 + 1.75
-0.25n + n2 = 0 + 1.75

Combine like terms: 0 + 1.75 = 1.75
-0.25n + n2 = 1.75

The n term is -0.25n.  Take half its coefficient (-0.125).
Square it (0.015625) and add it to both sides.

Add '0.015625' to each side of the equation.
-0.25n + 0.015625 + n2 = 1.75 + 0.015625

Reorder the terms:
0.015625 + -0.25n + n2 = 1.75 + 0.015625

Combine like terms: 1.75 + 0.015625 = 1.765625
0.015625 + -0.25n + n2 = 1.765625

Factor a perfect square on the left side:
(n + -0.125)(n + -0.125) = 1.765625

Calculate the square root of the right side: 1.328768227

Break this problem into two subproblems by setting 
(n + -0.125) equal to 1.328768227 and -1.328768227.

Subproblem 1

n + -0.125 = 1.328768227 Simplifying n + -0.125 = 1.328768227 Reorder the terms: -0.125 + n = 1.328768227 Solving -0.125 + n = 1.328768227 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.125' to each side of the equation. -0.125 + 0.125 + n = 1.328768227 + 0.125 Combine like terms: -0.125 + 0.125 = 0.000 0.000 + n = 1.328768227 + 0.125 n = 1.328768227 + 0.125 Combine like terms: 1.328768227 + 0.125 = 1.453768227 n = 1.453768227 Simplifying n = 1.453768227

Subproblem 2

n + -0.125 = -1.328768227 Simplifying n + -0.125 = -1.328768227 Reorder the terms: -0.125 + n = -1.328768227 Solving -0.125 + n = -1.328768227 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.125' to each side of the equation. -0.125 + 0.125 + n = -1.328768227 + 0.125 Combine like terms: -0.125 + 0.125 = 0.000 0.000 + n = -1.328768227 + 0.125 n = -1.328768227 + 0.125 Combine like terms: -1.328768227 + 0.125 = -1.203768227 n = -1.203768227 Simplifying n = -1.203768227

Solution

The solution to the problem is based on the solutions from the subproblems. n = {1.453768227, -1.203768227}

See similar equations:

| 2x-10=x+1 | | .169(x)=1 | | X-(7x-8)=32 | | X-(7z-8)= | | 5m+9=44 | | 4x-11=3x+1 | | (x+4)(3x-2)=24 | | 12x-7=6x+11 | | d+7=17 | | 23-7a=(3a-3) | | 5y-8+y=41+4y-5y | | 35+17= | | 3f=2 | | -10+(-31)= | | 4(x-3)=16x+12 | | p+6=11 | | 6x+4y+2= | | 9x+8=7x+10 | | 4x+3+3x=8x+3-x | | 3[5(y-3)+9]-2(8y-1)= | | y=-1E-05x | | 3x^2+5x-250=0 | | x/9=172 | | -18+(-6)= | | x^2+1x-156=0 | | 5x+14=2x+8 | | 2x-60=40 | | 22=5x+3x^2 | | 3x-2=3x+17 | | 22+15= | | -4(x+6)+6=6(x+3)+6 | | -10+(-3)= |

Equations solver categories