x+2=100-x^2

Simple and best practice solution for x+2=100-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 x+2=100-x^2 equation:


Simplifying
x + 2 = 100 + -1x2

Reorder the terms:
2 + x = 100 + -1x2

Solving
2 + x = 100 + -1x2

Solving for variable 'x'.

Reorder the terms:
2 + -100 + x + x2 = 100 + -1x2 + -100 + x2

Combine like terms: 2 + -100 = -98
-98 + x + x2 = 100 + -1x2 + -100 + x2

Reorder the terms:
-98 + x + x2 = 100 + -100 + -1x2 + x2

Combine like terms: 100 + -100 = 0
-98 + x + x2 = 0 + -1x2 + x2
-98 + x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
-98 + x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '98' to each side of the equation.
-98 + x + 98 + x2 = 0 + 98

Reorder the terms:
-98 + 98 + x + x2 = 0 + 98

Combine like terms: -98 + 98 = 0
0 + x + x2 = 0 + 98
x + x2 = 0 + 98

Combine like terms: 0 + 98 = 98
x + x2 = 98

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.
x + 0.25 + x2 = 98 + 0.25

Reorder the terms:
0.25 + x + x2 = 98 + 0.25

Combine like terms: 98 + 0.25 = 98.25
0.25 + x + x2 = 98.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 98.25

Calculate the square root of the right side: 9.912113801

Break this problem into two subproblems by setting 
(x + 0.5) equal to 9.912113801 and -9.912113801.

Subproblem 1

x + 0.5 = 9.912113801 Simplifying x + 0.5 = 9.912113801 Reorder the terms: 0.5 + x = 9.912113801 Solving 0.5 + x = 9.912113801 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 = 9.912113801 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 9.912113801 + -0.5 x = 9.912113801 + -0.5 Combine like terms: 9.912113801 + -0.5 = 9.412113801 x = 9.412113801 Simplifying x = 9.412113801

Subproblem 2

x + 0.5 = -9.912113801 Simplifying x + 0.5 = -9.912113801 Reorder the terms: 0.5 + x = -9.912113801 Solving 0.5 + x = -9.912113801 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 = -9.912113801 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -9.912113801 + -0.5 x = -9.912113801 + -0.5 Combine like terms: -9.912113801 + -0.5 = -10.412113801 x = -10.412113801 Simplifying x = -10.412113801

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.412113801, -10.412113801}

See similar equations:

| (3x^6)(4x^3)= | | x^3+4x^2=96x | | 5n-9=-29 | | -33+9x=6x+21 | | 2t+t^2=32 | | 2x+t^2=32 | | 8*4y= | | 8+4y= | | 5(3r-7)+r=3(r-3) | | 4n+3.5=9.9 | | {5*5-4}-300=200 | | 2(d+6)=9(d-1) | | 3y+6+4y+16+1y+5y= | | 2x+32=5x-7 | | 35+4x=7 | | 9x-11=52 | | -(4xy-12)+2(5xy+5)= | | 4.3x=7.5x | | 10(-3a+3b-4c)-9(4a-5b+2c)= | | 2x-9x+3x-x= | | y-3x=29 | | m^3+64=0 | | 0.19y+2.25-0.01y=5.85 | | 12x+28y=84 | | 450+2m=300+5m | | 3(n-1)-4=5n+3+2n | | 9x+(3-4x)= | | 39-.60=m | | m=.60+75 | | w-7=-15 | | 2y^2-32y+8=0 | | 4x+10=2y |

Equations solver categories