x^2=19-2x

Simple and best practice solution for x^2=19-2x 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=19-2x equation:


Simplifying
x2 = 19 + -2x

Solving
x2 = 19 + -2x

Solving for variable 'x'.

Reorder the terms:
-19 + 2x + x2 = 19 + -2x + -19 + 2x

Reorder the terms:
-19 + 2x + x2 = 19 + -19 + -2x + 2x

Combine like terms: 19 + -19 = 0
-19 + 2x + x2 = 0 + -2x + 2x
-19 + 2x + x2 = -2x + 2x

Combine like terms: -2x + 2x = 0
-19 + 2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '19' to each side of the equation.
-19 + 2x + 19 + x2 = 0 + 19

Reorder the terms:
-19 + 19 + 2x + x2 = 0 + 19

Combine like terms: -19 + 19 = 0
0 + 2x + x2 = 0 + 19
2x + x2 = 0 + 19

Combine like terms: 0 + 19 = 19
2x + x2 = 19

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 = 19 + 1

Reorder the terms:
1 + 2x + x2 = 19 + 1

Combine like terms: 19 + 1 = 20
1 + 2x + x2 = 20

Factor a perfect square on the left side:
(x + 1)(x + 1) = 20

Calculate the square root of the right side: 4.472135955

Break this problem into two subproblems by setting 
(x + 1) equal to 4.472135955 and -4.472135955.

Subproblem 1

x + 1 = 4.472135955 Simplifying x + 1 = 4.472135955 Reorder the terms: 1 + x = 4.472135955 Solving 1 + x = 4.472135955 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 = 4.472135955 + -1 Combine like terms: 1 + -1 = 0 0 + x = 4.472135955 + -1 x = 4.472135955 + -1 Combine like terms: 4.472135955 + -1 = 3.472135955 x = 3.472135955 Simplifying x = 3.472135955

Subproblem 2

x + 1 = -4.472135955 Simplifying x + 1 = -4.472135955 Reorder the terms: 1 + x = -4.472135955 Solving 1 + x = -4.472135955 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 = -4.472135955 + -1 Combine like terms: 1 + -1 = 0 0 + x = -4.472135955 + -1 x = -4.472135955 + -1 Combine like terms: -4.472135955 + -1 = -5.472135955 x = -5.472135955 Simplifying x = -5.472135955

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.472135955, -5.472135955}

See similar equations:

| 24-2logx=16 | | 21a^3-17a^2+2a=0 | | x^2=100-x | | 18x=2x+21 | | X^2=-100+x | | 2t^2=96 | | X^2=-19+x | | 4x^3-12x^2+12x-2=0 | | X^2=19+x | | 3(x+6)-25=3x-27 | | 8n=3n+35 | | X^2=19-5x | | 3x=-3+18 | | 16=24-2logx | | 5(1+2N)=65 | | 3(x-25)+6=3x-69 | | -27-25= | | X^2=19+-5x | | y-x=x+5 | | -5(3-2x)+4(1-3x)=-2x+7 | | 6x+6w= | | 3(x+6)-25=3x-7 | | a(4a+3)= | | 49v^2-14v+1=0 | | 4(1+4X)=24 | | 5x+3+125x=4+3x+25x | | 10x^3+22x^2+4x=0 | | 2y+x=11 | | 100+-7x=58 | | -4y-13=5y+24 | | (x^2+6)*(7-x)= | | 32x^2+96x+72=0 |

Equations solver categories