10n^2-2n-7=0

Simple and best practice solution for 10n^2-2n-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 10n^2-2n-7=0 equation:


Simplifying
10n2 + -2n + -7 = 0

Reorder the terms:
-7 + -2n + 10n2 = 0

Solving
-7 + -2n + 10n2 = 0

Solving for variable 'n'.

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

Divide each side by '10'.
-0.7 + -0.2n + n2 = 0

Move the constant term to the right:

Add '0.7' to each side of the equation.
-0.7 + -0.2n + 0.7 + n2 = 0 + 0.7

Reorder the terms:
-0.7 + 0.7 + -0.2n + n2 = 0 + 0.7

Combine like terms: -0.7 + 0.7 = 0.0
0.0 + -0.2n + n2 = 0 + 0.7
-0.2n + n2 = 0 + 0.7

Combine like terms: 0 + 0.7 = 0.7
-0.2n + n2 = 0.7

The n term is -0.2n.  Take half its coefficient (-0.1).
Square it (0.01) and add it to both sides.

Add '0.01' to each side of the equation.
-0.2n + 0.01 + n2 = 0.7 + 0.01

Reorder the terms:
0.01 + -0.2n + n2 = 0.7 + 0.01

Combine like terms: 0.7 + 0.01 = 0.71
0.01 + -0.2n + n2 = 0.71

Factor a perfect square on the left side:
(n + -0.1)(n + -0.1) = 0.71

Calculate the square root of the right side: 0.842614977

Break this problem into two subproblems by setting 
(n + -0.1) equal to 0.842614977 and -0.842614977.

Subproblem 1

n + -0.1 = 0.842614977 Simplifying n + -0.1 = 0.842614977 Reorder the terms: -0.1 + n = 0.842614977 Solving -0.1 + n = 0.842614977 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + n = 0.842614977 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + n = 0.842614977 + 0.1 n = 0.842614977 + 0.1 Combine like terms: 0.842614977 + 0.1 = 0.942614977 n = 0.942614977 Simplifying n = 0.942614977

Subproblem 2

n + -0.1 = -0.842614977 Simplifying n + -0.1 = -0.842614977 Reorder the terms: -0.1 + n = -0.842614977 Solving -0.1 + n = -0.842614977 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + n = -0.842614977 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + n = -0.842614977 + 0.1 n = -0.842614977 + 0.1 Combine like terms: -0.842614977 + 0.1 = -0.742614977 n = -0.742614977 Simplifying n = -0.742614977

Solution

The solution to the problem is based on the solutions from the subproblems. n = {0.942614977, -0.742614977}

See similar equations:

| 8x-36=5x+20 | | x+ax-10x=30 | | 4(x+8)=4(x+15) | | 2X-10+145=425 | | mb=po*8 | | 4(3+.5y)+18=2y | | 3v(v+4)(v-7)=0 | | 3x^2-2=xf | | 7+7(x-2)=5-5(x-6) | | X-10+y=425 | | -10+5x=4x+62 | | 3=116-7k+139 | | Kx^2+1-2(k-1)x+x^2=0 | | A=pa+pt | | 6(-6x-5)6x-5=245 | | 11=2f-3 | | .75p=0.4p+100 | | 4x^2-17x+3=-8x+1 | | 3y+10=43 | | -5+2h=-7 | | (x-3)/5-2=2x/5 | | 7+7(x-2)=5(x-6) | | -2x+6-4x=10 | | 13-2f=3 | | 5x+15=51-x | | X/3-8≥1 | | X^2-10x-19=-6x+2 | | 51+u=67 | | 6x+3y=9xy | | 4x+32+170=180 | | 23+2x=15 | | 10w=28+6w |

Equations solver categories