9x^2-17x-8=0

Simple and best practice solution for 9x^2-17x-8=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^2-17x-8=0 equation:


Simplifying
9x2 + -17x + -8 = 0

Reorder the terms:
-8 + -17x + 9x2 = 0

Solving
-8 + -17x + 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'.
-0.8888888889 + -1.888888889x + x2 = 0

Move the constant term to the right:

Add '0.8888888889' to each side of the equation.
-0.8888888889 + -1.888888889x + 0.8888888889 + x2 = 0 + 0.8888888889

Reorder the terms:
-0.8888888889 + 0.8888888889 + -1.888888889x + x2 = 0 + 0.8888888889

Combine like terms: -0.8888888889 + 0.8888888889 = 0.0000000000
0.0000000000 + -1.888888889x + x2 = 0 + 0.8888888889
-1.888888889x + x2 = 0 + 0.8888888889

Combine like terms: 0 + 0.8888888889 = 0.8888888889
-1.888888889x + x2 = 0.8888888889

The x term is -1.888888889x.  Take half its coefficient (-0.9444444445).
Square it (0.8919753087) and add it to both sides.

Add '0.8919753087' to each side of the equation.
-1.888888889x + 0.8919753087 + x2 = 0.8888888889 + 0.8919753087

Reorder the terms:
0.8919753087 + -1.888888889x + x2 = 0.8888888889 + 0.8919753087

Combine like terms: 0.8888888889 + 0.8919753087 = 1.7808641976
0.8919753087 + -1.888888889x + x2 = 1.7808641976

Factor a perfect square on the left side:
(x + -0.9444444445)(x + -0.9444444445) = 1.7808641976

Calculate the square root of the right side: 1.334490239

Break this problem into two subproblems by setting 
(x + -0.9444444445) equal to 1.334490239 and -1.334490239.

Subproblem 1

x + -0.9444444445 = 1.334490239 Simplifying x + -0.9444444445 = 1.334490239 Reorder the terms: -0.9444444445 + x = 1.334490239 Solving -0.9444444445 + x = 1.334490239 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9444444445' to each side of the equation. -0.9444444445 + 0.9444444445 + x = 1.334490239 + 0.9444444445 Combine like terms: -0.9444444445 + 0.9444444445 = 0.0000000000 0.0000000000 + x = 1.334490239 + 0.9444444445 x = 1.334490239 + 0.9444444445 Combine like terms: 1.334490239 + 0.9444444445 = 2.2789346835 x = 2.2789346835 Simplifying x = 2.2789346835

Subproblem 2

x + -0.9444444445 = -1.334490239 Simplifying x + -0.9444444445 = -1.334490239 Reorder the terms: -0.9444444445 + x = -1.334490239 Solving -0.9444444445 + x = -1.334490239 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9444444445' to each side of the equation. -0.9444444445 + 0.9444444445 + x = -1.334490239 + 0.9444444445 Combine like terms: -0.9444444445 + 0.9444444445 = 0.0000000000 0.0000000000 + x = -1.334490239 + 0.9444444445 x = -1.334490239 + 0.9444444445 Combine like terms: -1.334490239 + 0.9444444445 = -0.3900457945 x = -0.3900457945 Simplifying x = -0.3900457945

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.2789346835, -0.3900457945}

See similar equations:

| -8+x=-9 | | -8+6=-9 | | 2(3v+5)=46 | | 2(4w-7)=66 | | 3ax-k=5k | | 3ax-I=5k | | 7a+10=50a-3a | | 6x+3=3x+-12 | | 1(5x-14)=6 | | 8x-12=15x-33 | | 175+5c=105+15c | | x+22=44 | | -12c-25=-25-4 | | X+24+2x=-14-2x-17 | | 3(2z-1)-3(3-2z)= | | .5x-1=.75x+4 | | 6x-40=12-.5x | | 4x-2+(2x+7)=35 | | 100+6x=400 | | 4t+1=5(t+5) | | 3x+(2-4x)=35 | | 3-(x-5)=9 | | x=87.25 | | -2=-4(-7y+1)-5(8+2y) | | 3.4+2(9.7-4.8x)=61.2 | | -2.5x-8=-11.75 | | 18+2(ln(x))=20 | | 18+2ln(x)=20 | | 16+0.4x=4 | | 3+25x=20x+11 | | 10x+12x= | | 789o+62=810 |

Equations solver categories