-2m^2-5m+9=0

Simple and best practice solution for -2m^2-5m+9=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 -2m^2-5m+9=0 equation:


Simplifying
-2m2 + -5m + 9 = 0

Reorder the terms:
9 + -5m + -2m2 = 0

Solving
9 + -5m + -2m2 = 0

Solving for variable 'm'.

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
-4.5 + 2.5m + m2 = 0

Move the constant term to the right:

Add '4.5' to each side of the equation.
-4.5 + 2.5m + 4.5 + m2 = 0 + 4.5

Reorder the terms:
-4.5 + 4.5 + 2.5m + m2 = 0 + 4.5

Combine like terms: -4.5 + 4.5 = 0.0
0.0 + 2.5m + m2 = 0 + 4.5
2.5m + m2 = 0 + 4.5

Combine like terms: 0 + 4.5 = 4.5
2.5m + m2 = 4.5

The m term is 2.5m.  Take half its coefficient (1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
2.5m + 1.5625 + m2 = 4.5 + 1.5625

Reorder the terms:
1.5625 + 2.5m + m2 = 4.5 + 1.5625

Combine like terms: 4.5 + 1.5625 = 6.0625
1.5625 + 2.5m + m2 = 6.0625

Factor a perfect square on the left side:
(m + 1.25)(m + 1.25) = 6.0625

Calculate the square root of the right side: 2.46221445

Break this problem into two subproblems by setting 
(m + 1.25) equal to 2.46221445 and -2.46221445.

Subproblem 1

m + 1.25 = 2.46221445 Simplifying m + 1.25 = 2.46221445 Reorder the terms: 1.25 + m = 2.46221445 Solving 1.25 + m = 2.46221445 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + m = 2.46221445 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + m = 2.46221445 + -1.25 m = 2.46221445 + -1.25 Combine like terms: 2.46221445 + -1.25 = 1.21221445 m = 1.21221445 Simplifying m = 1.21221445

Subproblem 2

m + 1.25 = -2.46221445 Simplifying m + 1.25 = -2.46221445 Reorder the terms: 1.25 + m = -2.46221445 Solving 1.25 + m = -2.46221445 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + m = -2.46221445 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + m = -2.46221445 + -1.25 m = -2.46221445 + -1.25 Combine like terms: -2.46221445 + -1.25 = -3.71221445 m = -3.71221445 Simplifying m = -3.71221445

Solution

The solution to the problem is based on the solutions from the subproblems. m = {1.21221445, -3.71221445}

See similar equations:

| 5x+3x+3+x+6=6+x+6+x+6+x+6+x | | 8x+5y+11y-2y= | | 2(2k+4)=-2(-8k+6)+3(-6-2k) | | P=x+2x+x+2x | | 5x-13x=90 | | -2x^4+7=2x+5 | | (5x^2)-x-2=0 | | 3z^2+8z+-11=0 | | 5x+3x+3+x+6=6x+6x+6x+6x | | 2x^2+3x=(-5x) | | 12x+11=7x+31 | | 14-4k=2-2k | | =4e-8 | | 7x+6(-6x+2)=-133 | | x+30%=30200 | | 2g^2=-9g-4 | | log[3](9x)=4 | | -7(x+5)+x=3(1-x) | | x^2(0.03x+0.05)=0 | | 12y=35x+54 | | -9(w+3)=7w-11 | | 121+x-1=180 | | (r-6)+5r+(3r-3)=180 | | k=48x-9x^2 | | 3(a+b-c)= | | -21+5= | | 3(x-1/2)+4(1-2x)/3=x/4-5(x-1)/2 | | 5x-8(x-5)=1.6-3x | | x(15)=5 | | (78)(-4)= | | 3(x+2)+4(3+x)-3=7x | | x(15)=20 |

Equations solver categories