5-2x=x^2

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


Simplifying
5 + -2x = x2

Solving
5 + -2x = x2

Solving for variable 'x'.

Combine like terms: x2 + -1x2 = 0
5 + -2x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-5 + 2x + x2 = 0

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + 2x + 5 + x2 = 0 + 5

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

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

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

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 = 5 + 1

Reorder the terms:
1 + 2x + x2 = 5 + 1

Combine like terms: 5 + 1 = 6
1 + 2x + x2 = 6

Factor a perfect square on the left side:
(x + 1)(x + 1) = 6

Calculate the square root of the right side: 2.449489743

Break this problem into two subproblems by setting 
(x + 1) equal to 2.449489743 and -2.449489743.

Subproblem 1

x + 1 = 2.449489743 Simplifying x + 1 = 2.449489743 Reorder the terms: 1 + x = 2.449489743 Solving 1 + x = 2.449489743 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 = 2.449489743 + -1 Combine like terms: 1 + -1 = 0 0 + x = 2.449489743 + -1 x = 2.449489743 + -1 Combine like terms: 2.449489743 + -1 = 1.449489743 x = 1.449489743 Simplifying x = 1.449489743

Subproblem 2

x + 1 = -2.449489743 Simplifying x + 1 = -2.449489743 Reorder the terms: 1 + x = -2.449489743 Solving 1 + x = -2.449489743 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 = -2.449489743 + -1 Combine like terms: 1 + -1 = 0 0 + x = -2.449489743 + -1 x = -2.449489743 + -1 Combine like terms: -2.449489743 + -1 = -3.449489743 x = -3.449489743 Simplifying x = -3.449489743

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.449489743, -3.449489743}

See similar equations:

| 3x-17=8-2x | | -10x+4x=-22 | | 5x=38 | | 4x^2=-1 | | 3x+9-2x=7+2x-5 | | 2d^2-50=0 | | 5(4x-3)=205 | | log(8x+1)=1+log(x-2) | | 2x+4x+5x=18 | | 9y-11=74 | | 2cosx-sqrt=0 | | 1/5x-2=0 | | 9a^4b^4-27a^3b^3+18a^3b^2=equation | | 5(n-3)+3=13 | | 13.24=5.6+x | | Y=5x^2+3x | | 3v+4b=179 | | 2x-3(x)-5=7+(-x) | | 4x^2+2y-7=0 | | 3v+4b+202=13v+5b | | 28y^2+29y-9=0 | | X/1.2=5/2.4 | | 95+(8x-4)=180 | | 135+(x+15)=180 | | 5(1.04)6n=0 | | 8.23=x-4.11 | | x-(1x)=2500 | | 6+blank=26 | | 2+6X=24 | | 2500=x-(1x) | | 64+8x=180 | | 9(5x-3)=78.462 |

Equations solver categories