-2x^2-2x=-3

Simple and best practice solution for -2x^2-2x=-3 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^2-2x=-3 equation:


Simplifying
-2x2 + -2x = -3

Reorder the terms:
-2x + -2x2 = -3

Solving
-2x + -2x2 = -3

Solving for variable 'x'.

Reorder the terms:
3 + -2x + -2x2 = -3 + 3

Combine like terms: -3 + 3 = 0
3 + -2x + -2x2 = 0

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

Divide each side by '-2'.
-1.5 + x + x2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + x + 1.5 + x2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + x + x2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + x + x2 = 0 + 1.5
x + x2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
x + x2 = 1.5

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + x2 = 1.5 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = 1.5 + 0.25

Combine like terms: 1.5 + 0.25 = 1.75
1.25 + x2 = 1.75

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 1.75

Calculate the square root of the right side: 1.322875656

Break this problem into two subproblems by setting 
(x + 0.5) equal to 1.322875656 and -1.322875656.

Subproblem 1

x + 0.5 = 1.322875656 Simplifying x + 0.5 = 1.322875656 Reorder the terms: 0.5 + x = 1.322875656 Solving 0.5 + x = 1.322875656 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 1.322875656 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 1.322875656 + -0.5 x = 1.322875656 + -0.5 Combine like terms: 1.322875656 + -0.5 = 0.822875656 x = 0.822875656 Simplifying x = 0.822875656

Subproblem 2

x + 0.5 = -1.322875656 Simplifying x + 0.5 = -1.322875656 Reorder the terms: 0.5 + x = -1.322875656 Solving 0.5 + x = -1.322875656 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -1.322875656 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -1.322875656 + -0.5 x = -1.322875656 + -0.5 Combine like terms: -1.322875656 + -0.5 = -1.822875656 x = -1.822875656 Simplifying x = -1.822875656

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.822875656, -1.822875656}

See similar equations:

| 6x+9=-3+6x+12 | | 2y-8=-3-18 | | 10=4n-6n | | 8-6x+12= | | 3x+6=45-5x+20 | | 23x-14=17x+4 | | (3x^5/y)^-3 | | x^2-5x-14=36 | | 145-18n=125 | | 7x^2=-30x-8 | | 5/6(x-4)-8 | | -4(0.1x+0.4)-1.3=-0.5 | | 2y^2+16y=-30 | | -2/5m=6/7 | | X-2(-2)=-5 | | 550=-16x^2+60x | | 4(d+2)-2d=3 | | 9x^15y^4/-3x^5y^3=0 | | x-31+x+43+x= | | 22+6s=12+4s | | -1/3t2/9=7/9 | | -1(-3)(-6)(2)= | | 5x+3x-18=-74 | | 25r-7=-8 | | y-18=-29 | | 5m+12m+8m+11m+22m=8.70 | | 9x^15y^4/-3x^5y^3 | | -3(2s-5)-15=-3(6s+5)-5 | | 11x-29=8x+55 | | 3d+157=34 | | 2x+4.8=8.6 | | 10v^2-11=0 |

Equations solver categories