x+2x^2=26.2

Simple and best practice solution for x+2x^2=26.2 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 x+2x^2=26.2 equation:


Simplifying
x + 2x2 = 26.2

Solving
x + 2x2 = 26.2

Solving for variable 'x'.

Reorder the terms:
-26.2 + x + 2x2 = 26.2 + -26.2

Combine like terms: 26.2 + -26.2 = 0.0
-26.2 + x + 2x2 = 0.0

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

Divide each side by '2'.
-13.1 + 0.5x + x2 = 0.0

Move the constant term to the right:

Add '13.1' to each side of the equation.
-13.1 + 0.5x + 13.1 + x2 = 0.0 + 13.1

Reorder the terms:
-13.1 + 13.1 + 0.5x + x2 = 0.0 + 13.1

Combine like terms: -13.1 + 13.1 = 0.0
0.0 + 0.5x + x2 = 0.0 + 13.1
0.5x + x2 = 0.0 + 13.1

Combine like terms: 0.0 + 13.1 = 13.1
0.5x + x2 = 13.1

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.
0.5x + 0.25 + x2 = 13.1 + 0.25

Reorder the terms:
0.25 + 0.5x + x2 = 13.1 + 0.25

Combine like terms: 13.1 + 0.25 = 13.35
0.25 + 0.5x + x2 = 13.35

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 13.35

Calculate the square root of the right side: 3.653765181

Break this problem into two subproblems by setting 
(x + 0.5) equal to 3.653765181 and -3.653765181.

Subproblem 1

x + 0.5 = 3.653765181 Simplifying x + 0.5 = 3.653765181 Reorder the terms: 0.5 + x = 3.653765181 Solving 0.5 + x = 3.653765181 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 = 3.653765181 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 3.653765181 + -0.5 x = 3.653765181 + -0.5 Combine like terms: 3.653765181 + -0.5 = 3.153765181 x = 3.153765181 Simplifying x = 3.153765181

Subproblem 2

x + 0.5 = -3.653765181 Simplifying x + 0.5 = -3.653765181 Reorder the terms: 0.5 + x = -3.653765181 Solving 0.5 + x = -3.653765181 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 = -3.653765181 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -3.653765181 + -0.5 x = -3.653765181 + -0.5 Combine like terms: -3.653765181 + -0.5 = -4.153765181 x = -4.153765181 Simplifying x = -4.153765181

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.153765181, -4.153765181}

See similar equations:

| 160+0.7x=80+0.9x | | Y=-2(x-3)(x+5) | | 5x^2y^3z^4+10x^3y^2z^5+5x^2y^2z+15x^3y^3z^4= | | 5m-3=4m+7 | | 5000(.10)(.5)= | | 12+2x=6x-3 | | 7/8x=154 | | -41/8n=-39/4 | | (2*(x-25)*4-((3x-32)*5))/20 | | -10=m-60 | | 21000(.08)(5)= | | 9c+3=2(3c+1) | | 13-2x=22-5x | | 8y^2-2y-1= | | 5x+9(0)=45 | | 9000(.05)(2)= | | -51/8n=-93/4 | | 7x-13x+6=0 | | 9a^2A^3-27aA^2+18aA^4= | | 5j-5=9+3j | | 5x^2+9x=7 | | 9x+2(1/2x-2)=18 | | 4-0.5x=0.2x-10 | | 5j-5=9+3 | | 5000(.003)(4)= | | X^2+10=-3x | | 60(4x-80)=60 | | 5000(.03)(4)= | | x=22/13 | | 7(x-2)-6x=33 | | r^2+14r+48= | | 7+2(x-3)=9 |

Equations solver categories