-9x+x^2-2=0

Simple and best practice solution for -9x+x^2-2=0 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 -9x+x^2-2=0 equation:


Simplifying
-9x + x2 + -2 = 0

Reorder the terms:
-2 + -9x + x2 = 0

Solving
-2 + -9x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -9x + 2 + x2 = 0 + 2

Reorder the terms:
-2 + 2 + -9x + x2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -9x + x2 = 0 + 2
-9x + x2 = 0 + 2

Combine like terms: 0 + 2 = 2
-9x + x2 = 2

The x term is -9x.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9x + 20.25 + x2 = 2 + 20.25

Reorder the terms:
20.25 + -9x + x2 = 2 + 20.25

Combine like terms: 2 + 20.25 = 22.25
20.25 + -9x + x2 = 22.25

Factor a perfect square on the left side:
(x + -4.5)(x + -4.5) = 22.25

Calculate the square root of the right side: 4.716990566

Break this problem into two subproblems by setting 
(x + -4.5) equal to 4.716990566 and -4.716990566.

Subproblem 1

x + -4.5 = 4.716990566 Simplifying x + -4.5 = 4.716990566 Reorder the terms: -4.5 + x = 4.716990566 Solving -4.5 + x = 4.716990566 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = 4.716990566 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 4.716990566 + 4.5 x = 4.716990566 + 4.5 Combine like terms: 4.716990566 + 4.5 = 9.216990566 x = 9.216990566 Simplifying x = 9.216990566

Subproblem 2

x + -4.5 = -4.716990566 Simplifying x + -4.5 = -4.716990566 Reorder the terms: -4.5 + x = -4.716990566 Solving -4.5 + x = -4.716990566 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = -4.716990566 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -4.716990566 + 4.5 x = -4.716990566 + 4.5 Combine like terms: -4.716990566 + 4.5 = -0.216990566 x = -0.216990566 Simplifying x = -0.216990566

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.216990566, -0.216990566}

See similar equations:

| 2x-9x+18=5 | | (2x)2/3-(x)1/3=27 | | 2y-6x+x=13 | | 5+35x=21x+23 | | y^2-8x-10=0 | | 5y^2-10y-15=0 | | -1×1/4y=-2 | | 6x^2+11-7=0 | | -3-1/4t=-2 | | (-243)3/5 | | e^5x+6=11 | | 1/4×-3=-2 | | 7x+-9=40 | | X=1/4y=-2 | | x=6x+13 | | 6-7x-2=-29+4x-11 | | 4x+3y+2x=4y | | 7x=6-2x | | 11(k-1)=7(k-8.5) | | 3(y-10)+1=-7(y-8) | | 14-(x+5)=3(x+9)+10 | | 19=0 | | 4x-5-3x=2 | | 3-2y/4=2y/6 | | -3(2.5)+2y=4 | | logxy^2/z | | 6x=23-17 | | Y=-100x+70000 | | 3x-4+2x=20 | | (30+2x)(24+2x)-(30*24)=360 | | 4x^2-66x+180=0 | | (30-2x)(24-2x)-(30*24)=360 |

Equations solver categories