m^2+3m-15=0

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


Simplifying
m2 + 3m + -15 = 0

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

Solving
-15 + 3m + m2 = 0

Solving for variable 'm'.

Begin completing the square.

Move the constant term to the right:

Add '15' to each side of the equation.
-15 + 3m + 15 + m2 = 0 + 15

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

Combine like terms: -15 + 15 = 0
0 + 3m + m2 = 0 + 15
3m + m2 = 0 + 15

Combine like terms: 0 + 15 = 15
3m + m2 = 15

The m term is 3m.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3m + 2.25 + m2 = 15 + 2.25

Reorder the terms:
2.25 + 3m + m2 = 15 + 2.25

Combine like terms: 15 + 2.25 = 17.25
2.25 + 3m + m2 = 17.25

Factor a perfect square on the left side:
(m + 1.5)(m + 1.5) = 17.25

Calculate the square root of the right side: 4.153311931

Break this problem into two subproblems by setting 
(m + 1.5) equal to 4.153311931 and -4.153311931.

Subproblem 1

m + 1.5 = 4.153311931 Simplifying m + 1.5 = 4.153311931 Reorder the terms: 1.5 + m = 4.153311931 Solving 1.5 + m = 4.153311931 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + m = 4.153311931 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + m = 4.153311931 + -1.5 m = 4.153311931 + -1.5 Combine like terms: 4.153311931 + -1.5 = 2.653311931 m = 2.653311931 Simplifying m = 2.653311931

Subproblem 2

m + 1.5 = -4.153311931 Simplifying m + 1.5 = -4.153311931 Reorder the terms: 1.5 + m = -4.153311931 Solving 1.5 + m = -4.153311931 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + m = -4.153311931 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + m = -4.153311931 + -1.5 m = -4.153311931 + -1.5 Combine like terms: -4.153311931 + -1.5 = -5.653311931 m = -5.653311931 Simplifying m = -5.653311931

Solution

The solution to the problem is based on the solutions from the subproblems. m = {2.653311931, -5.653311931}

See similar equations:

| 24/8x | | 36=2z-82 | | 7x+9=11x-3 | | x(x+16)=-39 | | 3x-2/5=1 | | (2-v)(3v+4)=0 | | 2v-53=3v-85 | | 3z-83=2z | | 12w+13=9w+19 | | 2w=w+87 | | 6x+44=-14x+4 | | 10m-5-2(4m+7)= | | 5v-61=7v-91 | | 4a+14=17a-12 | | x^2-4y^2-8x+16y-36=0 | | 6x+44=14x-4 | | 6x+44=14x-5 | | 7q=10q-21 | | 11t+34=5t+40 | | 4+(4x-3)=-7 | | x^2-3c-7=0 | | 5 = 14(6x+16) | | 4sen^2x-8senx+3=0 | | 10(1/2x+2)-5=3(x-6)+1 | | 12-6x=15+3x | | 5x+2y=2900 | | -5x+5y=-4 | | f(5)+f(-2)= | | 8zx+4z=8z+1 | | 10+4a=9a | | 8x-8a=x-a | | 36x^2-24x^5/4x^2 |

Equations solver categories