9x^2-9x-17=0

Simple and best practice solution for 9x^2-9x-17=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^2-9x-17=0 equation:


Simplifying
9x2 + -9x + -17 = 0

Reorder the terms:
-17 + -9x + 9x2 = 0

Solving
-17 + -9x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
-1.888888889 + -1x + x2 = 0

Move the constant term to the right:

Add '1.888888889' to each side of the equation.
-1.888888889 + -1x + 1.888888889 + x2 = 0 + 1.888888889

Reorder the terms:
-1.888888889 + 1.888888889 + -1x + x2 = 0 + 1.888888889

Combine like terms: -1.888888889 + 1.888888889 = 0.000000000
0.000000000 + -1x + x2 = 0 + 1.888888889
-1x + x2 = 0 + 1.888888889

Combine like terms: 0 + 1.888888889 = 1.888888889
-1x + x2 = 1.888888889

The x term is -1x.  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.
-1x + 0.25 + x2 = 1.888888889 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 1.888888889 + 0.25

Combine like terms: 1.888888889 + 0.25 = 2.138888889
0.25 + -1x + x2 = 2.138888889

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 2.138888889

Calculate the square root of the right side: 1.462494065

Break this problem into two subproblems by setting 
(x + -0.5) equal to 1.462494065 and -1.462494065.

Subproblem 1

x + -0.5 = 1.462494065 Simplifying x + -0.5 = 1.462494065 Reorder the terms: -0.5 + x = 1.462494065 Solving -0.5 + x = 1.462494065 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 = 1.462494065 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 1.462494065 + 0.5 x = 1.462494065 + 0.5 Combine like terms: 1.462494065 + 0.5 = 1.962494065 x = 1.962494065 Simplifying x = 1.962494065

Subproblem 2

x + -0.5 = -1.462494065 Simplifying x + -0.5 = -1.462494065 Reorder the terms: -0.5 + x = -1.462494065 Solving -0.5 + x = -1.462494065 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 = -1.462494065 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -1.462494065 + 0.5 x = -1.462494065 + 0.5 Combine like terms: -1.462494065 + 0.5 = -0.962494065 x = -0.962494065 Simplifying x = -0.962494065

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.962494065, -0.962494065}

See similar equations:

| 4+2q^2=5 | | y+3=-3x | | 144=81+(x^2-25) | | 6n+10=8n+2 | | 19-2x+1=7x | | -12=7x-(-1) | | 7x*9=6x*7 | | 144=50i+2 | | 4X-24+8=6X+12-8 | | 13+7= | | 3y+16=4y+1 | | p-59=39 | | 3m-9+4m+15=-22 | | 86=c+32 | | 8a+3(2A+6)=46 | | 4x+7x=9x | | 5x+15x-17=19x-1 | | 5x+7(6x+6)=230 | | g+15=365 | | 15x=-4x+38 | | 11x+28=94 | | 2x+6x+5=7x | | -13+9=9+k | | .75-.5n=.625 | | 6+5k-10=5k-7-8k | | -12=n+67 | | -3x-3x+6=3x | | w^2+10w+25= | | 90=-80+10x | | x=40+3x | | 2t+5t=49 | | 2(y+8)=3(y-3) |

Equations solver categories