5w^2-w=20

Simple and best practice solution for 5w^2-w=20 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 5w^2-w=20 equation:


Simplifying
5w2 + -1w = 20

Reorder the terms:
-1w + 5w2 = 20

Solving
-1w + 5w2 = 20

Solving for variable 'w'.

Reorder the terms:
-20 + -1w + 5w2 = 20 + -20

Combine like terms: 20 + -20 = 0
-20 + -1w + 5w2 = 0

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

Divide each side by '5'.
-4 + -0.2w + w2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + -0.2w + 4 + w2 = 0 + 4

Reorder the terms:
-4 + 4 + -0.2w + w2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -0.2w + w2 = 0 + 4
-0.2w + w2 = 0 + 4

Combine like terms: 0 + 4 = 4
-0.2w + w2 = 4

The w term is -0.2w.  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.
-0.2w + 0.01 + w2 = 4 + 0.01

Reorder the terms:
0.01 + -0.2w + w2 = 4 + 0.01

Combine like terms: 4 + 0.01 = 4.01
0.01 + -0.2w + w2 = 4.01

Factor a perfect square on the left side:
(w + -0.1)(w + -0.1) = 4.01

Calculate the square root of the right side: 2.002498439

Break this problem into two subproblems by setting 
(w + -0.1) equal to 2.002498439 and -2.002498439.

Subproblem 1

w + -0.1 = 2.002498439 Simplifying w + -0.1 = 2.002498439 Reorder the terms: -0.1 + w = 2.002498439 Solving -0.1 + w = 2.002498439 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + w = 2.002498439 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + w = 2.002498439 + 0.1 w = 2.002498439 + 0.1 Combine like terms: 2.002498439 + 0.1 = 2.102498439 w = 2.102498439 Simplifying w = 2.102498439

Subproblem 2

w + -0.1 = -2.002498439 Simplifying w + -0.1 = -2.002498439 Reorder the terms: -0.1 + w = -2.002498439 Solving -0.1 + w = -2.002498439 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + w = -2.002498439 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + w = -2.002498439 + 0.1 w = -2.002498439 + 0.1 Combine like terms: -2.002498439 + 0.1 = -1.902498439 w = -1.902498439 Simplifying w = -1.902498439

Solution

The solution to the problem is based on the solutions from the subproblems. w = {2.102498439, -1.902498439}

See similar equations:

| 11x+4=48 | | x-(-20)=13 | | =3a+2b-a+5b-2 | | ax^2+2ax+2a=0 | | -10c=-120 | | X/40=6/15 | | 9a+7a-67=4+3a+7 | | 5x^2+16x+3= | | 3/5=x/40 | | y-13=2 | | 5-5d=2d-9 | | 5x-4y=-17 | | 0.3n-1.5=0.4n-0.2n-1.4 | | 0.3n-1.5=0.4n-0.2n-1.4 | | 0.3n-1.5=0.4n-0.2n-1.4 | | 4=5/6x | | 2x+11=p | | 15x-8y=82 | | 3y+17=13 | | 9=7m+-6 | | 9=7m+-6 | | 9=7m+-6 | | 3y+8=180 | | 3y+8=180 | | 3y+8=180 | | 2-d=4d-16 | | 3x^2-9y^2=1 | | 2-d=4d-16 | | 5x^2+55x=-50 | | 14x+553=285 | | 14x+553=285 | | 5x^2+55x=-50 |

Equations solver categories