5m^2+m-20=0

Simple and best practice solution for 5m^2+m-20=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 5m^2+m-20=0 equation:


Simplifying
5m2 + m + -20 = 0

Reorder the terms:
-20 + m + 5m2 = 0

Solving
-20 + m + 5m2 = 0

Solving for variable 'm'.

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

Divide each side by '5'.
-4 + 0.2m + m2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + 0.2m + 4 + m2 = 0 + 4

Reorder the terms:
-4 + 4 + 0.2m + m2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 0.2m + m2 = 0 + 4
0.2m + m2 = 0 + 4

Combine like terms: 0 + 4 = 4
0.2m + m2 = 4

The m term is m.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.2m + 0.25 + m2 = 4 + 0.25

Reorder the terms:
0.25 + 0.2m + m2 = 4 + 0.25

Combine like terms: 4 + 0.25 = 4.25
0.25 + 0.2m + m2 = 4.25

Factor a perfect square on the left side:
(m + 0.5)(m + 0.5) = 4.25

Calculate the square root of the right side: 2.061552813

Break this problem into two subproblems by setting 
(m + 0.5) equal to 2.061552813 and -2.061552813.

Subproblem 1

m + 0.5 = 2.061552813 Simplifying m + 0.5 = 2.061552813 Reorder the terms: 0.5 + m = 2.061552813 Solving 0.5 + m = 2.061552813 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + m = 2.061552813 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + m = 2.061552813 + -0.5 m = 2.061552813 + -0.5 Combine like terms: 2.061552813 + -0.5 = 1.561552813 m = 1.561552813 Simplifying m = 1.561552813

Subproblem 2

m + 0.5 = -2.061552813 Simplifying m + 0.5 = -2.061552813 Reorder the terms: 0.5 + m = -2.061552813 Solving 0.5 + m = -2.061552813 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + m = -2.061552813 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + m = -2.061552813 + -0.5 m = -2.061552813 + -0.5 Combine like terms: -2.061552813 + -0.5 = -2.561552813 m = -2.561552813 Simplifying m = -2.561552813

Solution

The solution to the problem is based on the solutions from the subproblems. m = {1.561552813, -2.561552813}

See similar equations:

| 56-4x=14x+22 | | 6t^2-4t= | | 7x^2+6x+3(x+2)= | | x^3y-9xy=0 | | B-(5)=-5 | | -2-23*12= | | x^2-64(x-2)= | | 4k-7=-37 | | -23r=-92 | | 4(6+4)=x(7+x) | | -17p=85 | | -22=19-x | | 7-r=15 | | 165-7x=38x+20 | | x^4-2x^3+2x^2-x-2=0 | | 18y=-2 | | y-(-18)=-2 | | x^4-2x^3-2=0 | | t-(-19)=49 | | (-37)+m=22 | | -4y+1=6(y+6) | | k-4k=6k+5-8k | | 2(3x+4)=4280 | | -2x+10=2*-10 | | 13+h=-15 | | 6y-4=17+8y | | 15+10=-5(3x-5) | | x+(-15)=-30 | | x+(-15)=30 | | P-(4)=-9 | | 4(3y-1)-5y=17 | | X^2+4=6x+1 |

Equations solver categories