0=2x^2-5x-5

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


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

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

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

Solving for variable 'x'.

Combine like terms: 0 + 5 = 5
5 + 5x + -2x2 = -5 + -5x + 2x2 + 5 + 5x + -2x2

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

Combine like terms: -5 + 5 = 0
5 + 5x + -2x2 = 0 + -5x + 5x + 2x2 + -2x2
5 + 5x + -2x2 = -5x + 5x + 2x2 + -2x2

Combine like terms: -5x + 5x = 0
5 + 5x + -2x2 = 0 + 2x2 + -2x2
5 + 5x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
5 + 5x + -2x2 = 0

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

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

Move the constant term to the right:

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

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

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

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

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = 2.5 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = 2.5 + 1.5625

Combine like terms: 2.5 + 1.5625 = 4.0625
1.5625 + -2.5x + x2 = 4.0625

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = 4.0625

Calculate the square root of the right side: 2.015564437

Break this problem into two subproblems by setting 
(x + -1.25) equal to 2.015564437 and -2.015564437.

Subproblem 1

x + -1.25 = 2.015564437 Simplifying x + -1.25 = 2.015564437 Reorder the terms: -1.25 + x = 2.015564437 Solving -1.25 + x = 2.015564437 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = 2.015564437 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 2.015564437 + 1.25 x = 2.015564437 + 1.25 Combine like terms: 2.015564437 + 1.25 = 3.265564437 x = 3.265564437 Simplifying x = 3.265564437

Subproblem 2

x + -1.25 = -2.015564437 Simplifying x + -1.25 = -2.015564437 Reorder the terms: -1.25 + x = -2.015564437 Solving -1.25 + x = -2.015564437 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = -2.015564437 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -2.015564437 + 1.25 x = -2.015564437 + 1.25 Combine like terms: -2.015564437 + 1.25 = -0.765564437 x = -0.765564437 Simplifying x = -0.765564437

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.265564437, -0.765564437}

See similar equations:

| 6(22-12x)+11(11+3x)=310 | | 3x^2-5x=7 | | y=2x^2-5x-5 | | 3x^2-9x^2-3x+20=0factorize | | 8y^2+14y+3= | | 3x^2-9x^2-3x+20=0 | | -7x^2+x^4-8=0 | | 2(x)+Y=1263 | | (13r+8)(5r-15)=0 | | 3x^2-9x^2-3x-20=0 | | 5x^2-23x-16=0 | | 0x=-2x^2+2 | | x=80-0.6(1.43x+10) | | -2x=-2x^2+12 | | 2(3+x)-4x+7=-1 | | (4/6)5= | | (5x^3+8x^2-5)+(3x^3-8x+7)= | | -36-8v=5(-4-2v) | | 2x^2+11x=1 | | -180=4(7b+1)-5b | | 0=3x^2-24x+48 | | (x-1)(x-5)= | | 3x^2-5x=6 | | 7(2+2x)=56 | | 5(2-x)=-x+6 | | 8(b+1)=6(8+2b) | | 10x-3y=60 | | 23f-5+5f=6 | | -6=2(w+2) | | 8(b+2)=6(8+2b) | | x^4-4x^3+6x^2-4x-1=0 | | 9p^2-44p-5= |

Equations solver categories