.2x^2-.4x-.02=0

Simple and best practice solution for .2x^2-.4x-.02=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-.4x-.02=0 equation:


Simplifying
0.2x2 + -0.4x + -0.02 = 0

Reorder the terms:
-0.02 + -0.4x + 0.2x2 = 0

Solving
-0.02 + -0.4x + 0.2x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.2'.
-0.1 + -2x + x2 = 0

Move the constant term to the right:

Add '0.1' to each side of the equation.
-0.1 + -2x + 0.1 + x2 = 0 + 0.1

Reorder the terms:
-0.1 + 0.1 + -2x + x2 = 0 + 0.1

Combine like terms: -0.1 + 0.1 = 0.0
0.0 + -2x + x2 = 0 + 0.1
-2x + x2 = 0 + 0.1

Combine like terms: 0 + 0.1 = 0.1
-2x + x2 = 0.1

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 0.1 + 1

Reorder the terms:
1 + -2x + x2 = 0.1 + 1

Combine like terms: 0.1 + 1 = 1.1
1 + -2x + x2 = 1.1

Factor a perfect square on the left side:
(x + -1)(x + -1) = 1.1

Calculate the square root of the right side: 1.048808848

Break this problem into two subproblems by setting 
(x + -1) equal to 1.048808848 and -1.048808848.

Subproblem 1

x + -1 = 1.048808848 Simplifying x + -1 = 1.048808848 Reorder the terms: -1 + x = 1.048808848 Solving -1 + x = 1.048808848 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 1.048808848 + 1 Combine like terms: -1 + 1 = 0 0 + x = 1.048808848 + 1 x = 1.048808848 + 1 Combine like terms: 1.048808848 + 1 = 2.048808848 x = 2.048808848 Simplifying x = 2.048808848

Subproblem 2

x + -1 = -1.048808848 Simplifying x + -1 = -1.048808848 Reorder the terms: -1 + x = -1.048808848 Solving -1 + x = -1.048808848 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -1.048808848 + 1 Combine like terms: -1 + 1 = 0 0 + x = -1.048808848 + 1 x = -1.048808848 + 1 Combine like terms: -1.048808848 + 1 = -0.048808848 x = -0.048808848 Simplifying x = -0.048808848

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.048808848, -0.048808848}

See similar equations:

| 125x^4-80x^2=0 | | 5x+2=2x+35 | | 8x+17=51 | | 8x-24-3x+6=5x-10 | | -15x+3x-5=-77 | | x^4-21x^280=0 | | 9d-5d=16 | | 17-3(x+5)=(x+5)-2x | | 2[w-(4w+16)+6]=2(w+10) | | 1248-94x=48x+325 | | -2(b-2)+6=-10 | | 1/3(d+9)=-9 | | 3x-4[4-(6-4x)]= | | 7x-42y+7= | | 6x^2-32x-16=0 | | -7p-4(6-4p)=5(p-3)-33 | | 4(2v+1)= | | 4(7-8x)-5=5(5x+1) | | 68+x=71.48 | | 4(2x+9)-(x-1)=10x+1 | | 8=15+8n | | 5=-6(q-5)-19 | | 10t-17=13-10t | | 3(4k+5)-7k+9=199 | | (4x+6y+6)(-xy)= | | 5w^3+3w^2+25w+15=0 | | 2ln(x)=4ln(3) | | 4(k+5)-7=61 | | -(2x+1)=8x+9 | | 5n-1+7=6 | | 4v-6+9(8v*2+5)= | | 0.75k+6=3 |

Equations solver categories