x^2-100-20x=0

Simple and best practice solution for x^2-100-20x=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 x^2-100-20x=0 equation:


Simplifying
x2 + -100 + -20x = 0

Reorder the terms:
-100 + -20x + x2 = 0

Solving
-100 + -20x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '100' to each side of the equation.
-100 + -20x + 100 + x2 = 0 + 100

Reorder the terms:
-100 + 100 + -20x + x2 = 0 + 100

Combine like terms: -100 + 100 = 0
0 + -20x + x2 = 0 + 100
-20x + x2 = 0 + 100

Combine like terms: 0 + 100 = 100
-20x + x2 = 100

The x term is -20x.  Take half its coefficient (-10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
-20x + 100 + x2 = 100 + 100

Reorder the terms:
100 + -20x + x2 = 100 + 100

Combine like terms: 100 + 100 = 200
100 + -20x + x2 = 200

Factor a perfect square on the left side:
(x + -10)(x + -10) = 200

Calculate the square root of the right side: 14.142135624

Break this problem into two subproblems by setting 
(x + -10) equal to 14.142135624 and -14.142135624.

Subproblem 1

x + -10 = 14.142135624 Simplifying x + -10 = 14.142135624 Reorder the terms: -10 + x = 14.142135624 Solving -10 + x = 14.142135624 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + x = 14.142135624 + 10 Combine like terms: -10 + 10 = 0 0 + x = 14.142135624 + 10 x = 14.142135624 + 10 Combine like terms: 14.142135624 + 10 = 24.142135624 x = 24.142135624 Simplifying x = 24.142135624

Subproblem 2

x + -10 = -14.142135624 Simplifying x + -10 = -14.142135624 Reorder the terms: -10 + x = -14.142135624 Solving -10 + x = -14.142135624 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + x = -14.142135624 + 10 Combine like terms: -10 + 10 = 0 0 + x = -14.142135624 + 10 x = -14.142135624 + 10 Combine like terms: -14.142135624 + 10 = -4.142135624 x = -4.142135624 Simplifying x = -4.142135624

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24.142135624, -4.142135624}

See similar equations:

| (5b-2)-(3-2b)=9 | | 2/7d-8=-32 | | 3a-6a=21 | | -0.5(x-2)=-2-x(-4) | | H=-2t^2+4t+8 | | -56=17g+29 | | (X*X)-11X=42 | | 3i-3i-9i= | | -4x+3y=4 | | =6+P-14(1) | | X*x-11x=42 | | 6xy(3xsquared-4ysquared)= | | 7(v-2)-5=-2(-8v+2)-3v | | =6+P-14F | | 26/20 | | 7f=2f-20 | | 4/x=9-8 | | 0.25(4z-7)+15=2z-5 | | 9x/4=5 | | x-9=1/3 | | 3.5d-5=1.5d | | 7x+8+2x+7= | | c=38.75+0.50x | | 0.25(4z-7)+15=2z-5(0.20z+2) | | 3xysquared-6xy= | | a/55/a/25 | | x/5-5=-12 | | 2[(m+80)+50]=3(m+50)-70 | | 10/14=x/28 | | 6x^2+48xy+96y^2=0 | | x-y=9z-n=14x+z=12y+n=2 | | 29y^2+17y=0 |

Equations solver categories