w^2-5w-18=0

Simple and best practice solution for w^2-5w-18=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 w^2-5w-18=0 equation:


Simplifying
w2 + -5w + -18 = 0

Reorder the terms:
-18 + -5w + w2 = 0

Solving
-18 + -5w + w2 = 0

Solving for variable 'w'.

Begin completing the square.

Move the constant term to the right:

Add '18' to each side of the equation.
-18 + -5w + 18 + w2 = 0 + 18

Reorder the terms:
-18 + 18 + -5w + w2 = 0 + 18

Combine like terms: -18 + 18 = 0
0 + -5w + w2 = 0 + 18
-5w + w2 = 0 + 18

Combine like terms: 0 + 18 = 18
-5w + w2 = 18

The w term is -5w.  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.
-5w + 6.25 + w2 = 18 + 6.25

Reorder the terms:
6.25 + -5w + w2 = 18 + 6.25

Combine like terms: 18 + 6.25 = 24.25
6.25 + -5w + w2 = 24.25

Factor a perfect square on the left side:
(w + -2.5)(w + -2.5) = 24.25

Calculate the square root of the right side: 4.924428901

Break this problem into two subproblems by setting 
(w + -2.5) equal to 4.924428901 and -4.924428901.

Subproblem 1

w + -2.5 = 4.924428901 Simplifying w + -2.5 = 4.924428901 Reorder the terms: -2.5 + w = 4.924428901 Solving -2.5 + w = 4.924428901 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + w = 4.924428901 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + w = 4.924428901 + 2.5 w = 4.924428901 + 2.5 Combine like terms: 4.924428901 + 2.5 = 7.424428901 w = 7.424428901 Simplifying w = 7.424428901

Subproblem 2

w + -2.5 = -4.924428901 Simplifying w + -2.5 = -4.924428901 Reorder the terms: -2.5 + w = -4.924428901 Solving -2.5 + w = -4.924428901 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + w = -4.924428901 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + w = -4.924428901 + 2.5 w = -4.924428901 + 2.5 Combine like terms: -4.924428901 + 2.5 = -2.424428901 w = -2.424428901 Simplifying w = -2.424428901

Solution

The solution to the problem is based on the solutions from the subproblems. w = {7.424428901, -2.424428901}

See similar equations:

| .14287y+3=.5y | | -(w+3)=-6w+14 | | 56+12*m=80+8*m | | 5t+1=26 | | 100=x-100 | | 28000+3000*y=36000+2000*y | | 3x+12x+5=0 | | 0.75d+5=d | | 3+2(4x-1)=6-x | | 2(3-5)=-5-9-6*-5 | | 9x-(6x-9)=2+2x-7 | | 0=x^2+12x+40 | | 44(y-51)=y | | 3+2(4x-6)=6-x | | 2x+5=-6-10x | | 17=x+(y+5) | | -14x+4(2x-5)=9 | | 122-4x=3x+17 | | 120+22x=196-24x | | 62+x=12 | | x/2+2=4x/6-x/12 | | 2x^2-9=-10 | | 3+8x=2(x-5)+12 | | 7+6*0=10*0+7-30*0 | | 19+y=-9 | | 25-4m=4m-3m | | X*3+7=71 | | 7x+2=4x-7 | | p+23=26 | | 0.49(n-24)=0.8n | | x+19=25 | | 8+3*-5=m |

Equations solver categories