2x^2+2x-105=0

Simple and best practice solution for 2x^2+2x-105=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+2x-105=0 equation:


Simplifying
2x2 + 2x + -105 = 0

Reorder the terms:
-105 + 2x + 2x2 = 0

Solving
-105 + 2x + 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'.
-52.5 + x + x2 = 0

Move the constant term to the right:

Add '52.5' to each side of the equation.
-52.5 + x + 52.5 + x2 = 0 + 52.5

Reorder the terms:
-52.5 + 52.5 + x + x2 = 0 + 52.5

Combine like terms: -52.5 + 52.5 = 0.0
0.0 + x + x2 = 0 + 52.5
x + x2 = 0 + 52.5

Combine like terms: 0 + 52.5 = 52.5
x + x2 = 52.5

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 = 52.5 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = 52.5 + 0.25

Combine like terms: 52.5 + 0.25 = 52.75
1.25 + x2 = 52.75

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 52.75

Calculate the square root of the right side: 7.262919523

Break this problem into two subproblems by setting 
(x + 0.5) equal to 7.262919523 and -7.262919523.

Subproblem 1

x + 0.5 = 7.262919523 Simplifying x + 0.5 = 7.262919523 Reorder the terms: 0.5 + x = 7.262919523 Solving 0.5 + x = 7.262919523 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 = 7.262919523 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 7.262919523 + -0.5 x = 7.262919523 + -0.5 Combine like terms: 7.262919523 + -0.5 = 6.762919523 x = 6.762919523 Simplifying x = 6.762919523

Subproblem 2

x + 0.5 = -7.262919523 Simplifying x + 0.5 = -7.262919523 Reorder the terms: 0.5 + x = -7.262919523 Solving 0.5 + x = -7.262919523 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 = -7.262919523 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -7.262919523 + -0.5 x = -7.262919523 + -0.5 Combine like terms: -7.262919523 + -0.5 = -7.762919523 x = -7.762919523 Simplifying x = -7.762919523

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.762919523, -7.762919523}

See similar equations:

| 2n^2+22n+56=0 | | 2x-175=25 | | 4(4)-3y=19 | | y=-13+-4x | | 3x+9x-13=11 | | 15-14b-8b^2=0 | | 9+9q=13+8q | | 5x+2(-7x+7)=-58 | | 6(8-2x)+1=5(2-3x) | | 30+x=40 | | -12x-17-3x=10 | | 17z-8=13z-16 | | 8p+2(3p-4)= | | 34=5x+-21 | | 0.8h=1.12 | | 636557x=2 | | 2x+5x+x+20=180 | | 51+3x= | | 11-5y=6y | | -12x-17-3=10 | | 6y-30y^2=0 | | 37x=72 | | 3/2x_4=16 | | 9xsquared=27x | | 7y-10=3y+12 | | 3x+7=88 | | d-7=-2d+5 | | 4x+45=61+2x | | 3j+4=4j-3 | | Y=0.29+13 | | 9x+4=x-4 | | (3t-2)(t-3)= |

Equations solver categories