100x-4x^2=20

Simple and best practice solution for 100x-4x^2=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 100x-4x^2=20 equation:


Simplifying
100x + -4x2 = 20

Solving
100x + -4x2 = 20

Solving for variable 'x'.

Reorder the terms:
-20 + 100x + -4x2 = 20 + -20

Combine like terms: 20 + -20 = 0
-20 + 100x + -4x2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-5 + 25x + -1x2) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-5 + 25x + -1x2)' equal to zero and attempt to solve: Simplifying -5 + 25x + -1x2 = 0 Solving -5 + 25x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 5 + -25x + x2 = 0 Move the constant term to the right: Add '-5' to each side of the equation. 5 + -25x + -5 + x2 = 0 + -5 Reorder the terms: 5 + -5 + -25x + x2 = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -25x + x2 = 0 + -5 -25x + x2 = 0 + -5 Combine like terms: 0 + -5 = -5 -25x + x2 = -5 The x term is -25x. Take half its coefficient (-12.5). Square it (156.25) and add it to both sides. Add '156.25' to each side of the equation. -25x + 156.25 + x2 = -5 + 156.25 Reorder the terms: 156.25 + -25x + x2 = -5 + 156.25 Combine like terms: -5 + 156.25 = 151.25 156.25 + -25x + x2 = 151.25 Factor a perfect square on the left side: (x + -12.5)(x + -12.5) = 151.25 Calculate the square root of the right side: 12.298373876 Break this problem into two subproblems by setting (x + -12.5) equal to 12.298373876 and -12.298373876.

Subproblem 1

x + -12.5 = 12.298373876 Simplifying x + -12.5 = 12.298373876 Reorder the terms: -12.5 + x = 12.298373876 Solving -12.5 + x = 12.298373876 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12.5' to each side of the equation. -12.5 + 12.5 + x = 12.298373876 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = 12.298373876 + 12.5 x = 12.298373876 + 12.5 Combine like terms: 12.298373876 + 12.5 = 24.798373876 x = 24.798373876 Simplifying x = 24.798373876

Subproblem 2

x + -12.5 = -12.298373876 Simplifying x + -12.5 = -12.298373876 Reorder the terms: -12.5 + x = -12.298373876 Solving -12.5 + x = -12.298373876 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12.5' to each side of the equation. -12.5 + 12.5 + x = -12.298373876 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = -12.298373876 + 12.5 x = -12.298373876 + 12.5 Combine like terms: -12.298373876 + 12.5 = 0.201626124 x = 0.201626124 Simplifying x = 0.201626124

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24.798373876, 0.201626124}

Solution

x = {24.798373876, 0.201626124}

See similar equations:

| 4x^2-25x+14=-4x+9 | | 4v-24=8v | | 7(c+2.1)=14c-0.7 | | 56(7)= | | 1.5(y-10)=0.4-y | | 3x+21=48+2x | | -8=x-2y | | 14=p-8 | | 1/4t+1/3t=7/12 | | 0.05+0.01x=6x | | 2(x+3)=6x-12 | | 5(2x+3x)-20=55 | | 100-4x=20 | | 6x+3y=16 | | 100-4x= | | t^2=33 | | 3x+9=21x | | x+(x-6)+15=39 | | (X-1)(x+9)=0 | | 11.2t+2=4.7t+44.90 | | 9-4d=3 | | 2x+5y=-44 | | 2.1x+97=4.7x+6 | | x^2-4xy^2=0 | | 5(2x-1)+3(4-9x)=0 | | 12x-5=7x+60 | | 1x-8=-6x+6 | | 2x+3=4+6x | | 7(x-3)=84 | | 11f+6=12f+6 | | -2z+7=21 | | 8(3s+6)= |

Equations solver categories