3m^2-15m-1=0

Simple and best practice solution for 3m^2-15m-1=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 3m^2-15m-1=0 equation:


Simplifying
3m2 + -15m + -1 = 0

Reorder the terms:
-1 + -15m + 3m2 = 0

Solving
-1 + -15m + 3m2 = 0

Solving for variable 'm'.

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

Divide each side by '3'.
-0.3333333333 + -5m + m2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + -5m + 0.3333333333 + m2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + -5m + m2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + -5m + m2 = 0 + 0.3333333333
-5m + m2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
-5m + m2 = 0.3333333333

The m term is -5m.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5m + 6.25 + m2 = 0.3333333333 + 6.25

Reorder the terms:
6.25 + -5m + m2 = 0.3333333333 + 6.25

Combine like terms: 0.3333333333 + 6.25 = 6.5833333333
6.25 + -5m + m2 = 6.5833333333

Factor a perfect square on the left side:
(m + -2.5)(m + -2.5) = 6.5833333333

Calculate the square root of the right side: 2.56580072

Break this problem into two subproblems by setting 
(m + -2.5) equal to 2.56580072 and -2.56580072.

Subproblem 1

m + -2.5 = 2.56580072 Simplifying m + -2.5 = 2.56580072 Reorder the terms: -2.5 + m = 2.56580072 Solving -2.5 + m = 2.56580072 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + m = 2.56580072 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + m = 2.56580072 + 2.5 m = 2.56580072 + 2.5 Combine like terms: 2.56580072 + 2.5 = 5.06580072 m = 5.06580072 Simplifying m = 5.06580072

Subproblem 2

m + -2.5 = -2.56580072 Simplifying m + -2.5 = -2.56580072 Reorder the terms: -2.5 + m = -2.56580072 Solving -2.5 + m = -2.56580072 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + m = -2.56580072 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + m = -2.56580072 + 2.5 m = -2.56580072 + 2.5 Combine like terms: -2.56580072 + 2.5 = -0.06580072 m = -0.06580072 Simplifying m = -0.06580072

Solution

The solution to the problem is based on the solutions from the subproblems. m = {5.06580072, -0.06580072}

See similar equations:

| 6-x/4=-8 | | 6x+2=x-1 | | 2x-8=-6x+8/2 | | -4a*2a*1-5a-6a=10-10a | | 2x+1o=-2 | | (4x^2-10x-24)/(2x+3) | | 3x+5=y+3 | | 2v*3v^2y^3*8y^9= | | -5x+2x=-8-10 | | (3x^2-11)(3x^2+11)= | | x^2/4=2x-10 | | 8x-4=6-10 | | 25/16*a^4*b^2*c^8 | | 4(2d-9)= | | (8x+3)(4x+7)= | | 0.3x+0.4=0.2x | | 8y-47y=7 | | 3+9=7t-9 | | x+43=-18 | | 8x^2-4xy-4y= | | 6n^2-63=-3n | | 21w^5-4w^5= | | x=48.8-.08x | | -3z^4-11z^4= | | 2+12=5t-6 | | x=243+0.4x | | 70+25a=200 | | 15m+4=23m | | 8=-9h+26 | | x^2-4.7x=-28 | | x-.08x=48.80 | | -6a^5-22a^5= |

Equations solver categories