x^2+2x=198

Simple and best practice solution for x^2+2x=198 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 x^2+2x=198 equation:


Simplifying
x2 + 2x = 198

Reorder the terms:
2x + x2 = 198

Solving
2x + x2 = 198

Solving for variable 'x'.

Reorder the terms:
-198 + 2x + x2 = 198 + -198

Combine like terms: 198 + -198 = 0
-198 + 2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '198' to each side of the equation.
-198 + 2x + 198 + x2 = 0 + 198

Reorder the terms:
-198 + 198 + 2x + x2 = 0 + 198

Combine like terms: -198 + 198 = 0
0 + 2x + x2 = 0 + 198
2x + x2 = 0 + 198

Combine like terms: 0 + 198 = 198
2x + x2 = 198

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 = 198 + 1

Reorder the terms:
1 + 2x + x2 = 198 + 1

Combine like terms: 198 + 1 = 199
1 + 2x + x2 = 199

Factor a perfect square on the left side:
(x + 1)(x + 1) = 199

Calculate the square root of the right side: 14.10673598

Break this problem into two subproblems by setting 
(x + 1) equal to 14.10673598 and -14.10673598.

Subproblem 1

x + 1 = 14.10673598 Simplifying x + 1 = 14.10673598 Reorder the terms: 1 + x = 14.10673598 Solving 1 + x = 14.10673598 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 = 14.10673598 + -1 Combine like terms: 1 + -1 = 0 0 + x = 14.10673598 + -1 x = 14.10673598 + -1 Combine like terms: 14.10673598 + -1 = 13.10673598 x = 13.10673598 Simplifying x = 13.10673598

Subproblem 2

x + 1 = -14.10673598 Simplifying x + 1 = -14.10673598 Reorder the terms: 1 + x = -14.10673598 Solving 1 + x = -14.10673598 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 = -14.10673598 + -1 Combine like terms: 1 + -1 = 0 0 + x = -14.10673598 + -1 x = -14.10673598 + -1 Combine like terms: -14.10673598 + -1 = -15.10673598 x = -15.10673598 Simplifying x = -15.10673598

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.10673598, -15.10673598}

See similar equations:

| 5x-3=-6x-9 | | 9+13t=9+12t | | 234x=3 | | 2x-(4x+5)=11.+2(3-4x) | | 5y-2(y-3)+5= | | 2x^8+4x^2=x+x | | 10y-6y= | | 234x=9 | | -4=6a-6-4 | | 4x+8=-96-9 | | .7x=252 | | N+5+6n=-16 | | 4x+(x-10)=10(x-8)-12 | | 32+4z+-3z^2=0 | | 2y-7+4y-8= | | N-19=17 | | 3.4(8x-4)=-3 | | -3x-2x=-10 | | 5(30+-1.4y)+7y=150 | | -29-b=15 | | 8x-6=3x+11 | | 3x+1=5-2(x+12) | | x(3x-7)=(3x+6)(x-5) | | 3a+5a=-24 | | -44-b=15 | | 3.56x+4=12.6736+2x | | 6x+25=3x+61 | | -8a+7a=2 | | 140=12m-8m | | z-3.42=-11.4 | | -5y+3=-2y-8 | | 2-3.42=-11.4 |

Equations solver categories