2x^2-20x-5=0

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


Simplifying
2x2 + -20x + -5 = 0

Reorder the terms:
-5 + -20x + 2x2 = 0

Solving
-5 + -20x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-2.5 + -10x + x2 = 0

Move the constant term to the right:

Add '2.5' to each side of the equation.
-2.5 + -10x + 2.5 + x2 = 0 + 2.5

Reorder the terms:
-2.5 + 2.5 + -10x + x2 = 0 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0
0.0 + -10x + x2 = 0 + 2.5
-10x + x2 = 0 + 2.5

Combine like terms: 0 + 2.5 = 2.5
-10x + x2 = 2.5

The x term is -10x.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10x + 25 + x2 = 2.5 + 25

Reorder the terms:
25 + -10x + x2 = 2.5 + 25

Combine like terms: 2.5 + 25 = 27.5
25 + -10x + x2 = 27.5

Factor a perfect square on the left side:
(x + -5)(x + -5) = 27.5

Calculate the square root of the right side: 5.244044241

Break this problem into two subproblems by setting 
(x + -5) equal to 5.244044241 and -5.244044241.

Subproblem 1

x + -5 = 5.244044241 Simplifying x + -5 = 5.244044241 Reorder the terms: -5 + x = 5.244044241 Solving -5 + x = 5.244044241 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = 5.244044241 + 5 Combine like terms: -5 + 5 = 0 0 + x = 5.244044241 + 5 x = 5.244044241 + 5 Combine like terms: 5.244044241 + 5 = 10.244044241 x = 10.244044241 Simplifying x = 10.244044241

Subproblem 2

x + -5 = -5.244044241 Simplifying x + -5 = -5.244044241 Reorder the terms: -5 + x = -5.244044241 Solving -5 + x = -5.244044241 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = -5.244044241 + 5 Combine like terms: -5 + 5 = 0 0 + x = -5.244044241 + 5 x = -5.244044241 + 5 Combine like terms: -5.244044241 + 5 = -0.244044241 x = -0.244044241 Simplifying x = -0.244044241

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.244044241, -0.244044241}

See similar equations:

| 3-33/9 | | 3a^2-22a+24=0 | | 59-6x=30x+19 | | 3(x+4)-(x+2)=40 | | (4t)^2t^0/4t^-8v^-8 | | 0,84/x=24000 | | -5/3x-1/3x=-2 | | -30/(-10)=3 | | 2x=3a | | 2x+6=5x-3/4 | | -30/(-10) | | 30=m-3 | | 8+2/x^5 | | 0.29x+100+1.2x=51 | | 18x+216=18x+216 | | 12x+12/2x+2 | | (y/8)+19=30 | | 3-4n+2n=2n-15 | | 1/2=-3/2x+1+1 | | 7x^5=5+2x^5 | | 9/2+5/2y=2y*2 | | 5x+2(x-5)=1 | | 5/8a=1/4 | | 0.15-0.01(x+1)=-6.02(2-x) | | 4-(3-5x)=0 | | (3/4)q-7=8 | | (x+4)(x+4)+76=(x+2)(x+2) | | 7(x-2)+3=3x+4(-2+x) | | 3x+12.00=16.95 | | x+5/8 | | d+12.6=9 | | x/4+1/3 |

Equations solver categories