9x^2+9x+1=0

Simple and best practice solution for 9x^2+9x+1=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+1=0 equation:


Simplifying
9x2 + 9x + 1 = 0

Reorder the terms:
1 + 9x + 9x2 = 0

Solving
1 + 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'.
0.1111111111 + x + x2 = 0

Move the constant term to the right:

Add '-0.1111111111' to each side of the equation.
0.1111111111 + x + -0.1111111111 + x2 = 0 + -0.1111111111

Reorder the terms:
0.1111111111 + -0.1111111111 + x + x2 = 0 + -0.1111111111

Combine like terms: 0.1111111111 + -0.1111111111 = 0.0000000000
0.0000000000 + x + x2 = 0 + -0.1111111111
x + x2 = 0 + -0.1111111111

Combine like terms: 0 + -0.1111111111 = -0.1111111111
x + x2 = -0.1111111111

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.
 + 0.25 + x2 = -0.1111111111 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = -0.1111111111 + 0.25

Combine like terms: -0.1111111111 + 0.25 = 0.1388888889
1.25 + x2 = 0.1388888889

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 0.1388888889

Calculate the square root of the right side: 0.372677996

Break this problem into two subproblems by setting 
(x + 0.5) equal to 0.372677996 and -0.372677996.

Subproblem 1

x + 0.5 = 0.372677996 Simplifying x + 0.5 = 0.372677996 Reorder the terms: 0.5 + x = 0.372677996 Solving 0.5 + x = 0.372677996 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 = 0.372677996 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 0.372677996 + -0.5 x = 0.372677996 + -0.5 Combine like terms: 0.372677996 + -0.5 = -0.127322004 x = -0.127322004 Simplifying x = -0.127322004

Subproblem 2

x + 0.5 = -0.372677996 Simplifying x + 0.5 = -0.372677996 Reorder the terms: 0.5 + x = -0.372677996 Solving 0.5 + x = -0.372677996 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 = -0.372677996 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -0.372677996 + -0.5 x = -0.372677996 + -0.5 Combine like terms: -0.372677996 + -0.5 = -0.872677996 x = -0.872677996 Simplifying x = -0.872677996

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.127322004, -0.872677996}

See similar equations:

| -10=13z+16 | | -14=-3e+9 | | 82=14x+12 | | 15-6=23-2g | | 69=-7m+20 | | y^2+2y=140 | | 32=-35+17 | | 10-5m=15 | | 69=15n+9 | | 5m-2m+14=31 | | 59=2g+23 | | X^2+8X-6Y+4=0 | | 5m-2m-14=31 | | (4x+5)+(3x-3)= | | 4x^2+4y^2+5=0 | | 2x+4+1=7 | | 3X^2-12X-6Y+9=0 | | 60000=9 | | 9r=3000 | | (2cosx-1)(cos^2x-1)=0 | | 4b^2-40b-64=0 | | 9=60000 | | K^2+28=-11k | | 7n-18.9=7.5-3 | | m^2+7p=0 | | -x+12=-5 | | 5(3v-11)=-10 | | x(4x+44)=153 | | -9=-4f+7 | | -13.3+k=-0.296 | | f(x)=4x^3-15x^2-72x+5 | | -2-b=-5+4(4b+5) |

Equations solver categories