2x(x-2)-5=0

Simple and best practice solution for 2x(x-2)-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(x-2)-5=0 equation:


Simplifying
2x(x + -2) + -5 = 0

Reorder the terms:
2x(-2 + x) + -5 = 0
(-2 * 2x + x * 2x) + -5 = 0
(-4x + 2x2) + -5 = 0

Reorder the terms:
-5 + -4x + 2x2 = 0

Solving
-5 + -4x + 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 + -2x + x2 = 0

Move the constant term to the right:

Add '2.5' to each side of the equation.
-2.5 + -2x + 2.5 + x2 = 0 + 2.5

Reorder the terms:
-2.5 + 2.5 + -2x + x2 = 0 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0
0.0 + -2x + x2 = 0 + 2.5
-2x + x2 = 0 + 2.5

Combine like terms: 0 + 2.5 = 2.5
-2x + x2 = 2.5

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 = 2.5 + 1

Reorder the terms:
1 + -2x + x2 = 2.5 + 1

Combine like terms: 2.5 + 1 = 3.5
1 + -2x + x2 = 3.5

Factor a perfect square on the left side:
(x + -1)(x + -1) = 3.5

Calculate the square root of the right side: 1.870828693

Break this problem into two subproblems by setting 
(x + -1) equal to 1.870828693 and -1.870828693.

Subproblem 1

x + -1 = 1.870828693 Simplifying x + -1 = 1.870828693 Reorder the terms: -1 + x = 1.870828693 Solving -1 + x = 1.870828693 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 = 1.870828693 + 1 Combine like terms: -1 + 1 = 0 0 + x = 1.870828693 + 1 x = 1.870828693 + 1 Combine like terms: 1.870828693 + 1 = 2.870828693 x = 2.870828693 Simplifying x = 2.870828693

Subproblem 2

x + -1 = -1.870828693 Simplifying x + -1 = -1.870828693 Reorder the terms: -1 + x = -1.870828693 Solving -1 + x = -1.870828693 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 = -1.870828693 + 1 Combine like terms: -1 + 1 = 0 0 + x = -1.870828693 + 1 x = -1.870828693 + 1 Combine like terms: -1.870828693 + 1 = -0.870828693 x = -0.870828693 Simplifying x = -0.870828693

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.870828693, -0.870828693}

See similar equations:

| 3y-6=22-5 | | 3y-6=x-5 | | -13=7x+64 | | 37+12x=85 | | -4-8x=36 | | 8x-8=7x+14 | | -44=-3x-2 | | 2x+17=53 | | 8x-8=7x+4 | | -12=x-21 | | 4x-7=9x | | -57=-12+3x | | 29=-8x-3 | | 3-x=-4 | | 11-3v-u= | | 0.6x-0.8(3-x)=2.5 | | -3x=-10+2x | | y^2-18x=0 | | 9x=16+5x | | 6x-3=27x | | -6u-27=7(u-2) | | =-3[x+2]2+5 | | 5x+6=4x+5 | | 5(z-2)+4z-4= | | 4ln(x-7)=8 | | 5k-8=1(9) | | 2u-6=-2 | | Y^2+3y-6=0 | | 70=3w+16 | | 4(z-2)+8z-1= | | c=2.88(6)+14.18 | | 2(5z-1)-3(z-2)= |

Equations solver categories