9x^2-16x-324=0

Simple and best practice solution for 9x^2-16x-324=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^2-16x-324=0 equation:


Simplifying
9x2 + -16x + -324 = 0

Reorder the terms:
-324 + -16x + 9x2 = 0

Solving
-324 + -16x + 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'.
-36 + -1.777777778x + x2 = 0

Move the constant term to the right:

Add '36' to each side of the equation.
-36 + -1.777777778x + 36 + x2 = 0 + 36

Reorder the terms:
-36 + 36 + -1.777777778x + x2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + -1.777777778x + x2 = 0 + 36
-1.777777778x + x2 = 0 + 36

Combine like terms: 0 + 36 = 36
-1.777777778x + x2 = 36

The x term is -1.777777778x.  Take half its coefficient (-0.888888889).
Square it (0.7901234570) and add it to both sides.

Add '0.7901234570' to each side of the equation.
-1.777777778x + 0.7901234570 + x2 = 36 + 0.7901234570

Reorder the terms:
0.7901234570 + -1.777777778x + x2 = 36 + 0.7901234570

Combine like terms: 36 + 0.7901234570 = 36.790123457
0.7901234570 + -1.777777778x + x2 = 36.790123457

Factor a perfect square on the left side:
(x + -0.888888889)(x + -0.888888889) = 36.790123457

Calculate the square root of the right side: 6.065486251

Break this problem into two subproblems by setting 
(x + -0.888888889) equal to 6.065486251 and -6.065486251.

Subproblem 1

x + -0.888888889 = 6.065486251 Simplifying x + -0.888888889 = 6.065486251 Reorder the terms: -0.888888889 + x = 6.065486251 Solving -0.888888889 + x = 6.065486251 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.888888889' to each side of the equation. -0.888888889 + 0.888888889 + x = 6.065486251 + 0.888888889 Combine like terms: -0.888888889 + 0.888888889 = 0.000000000 0.000000000 + x = 6.065486251 + 0.888888889 x = 6.065486251 + 0.888888889 Combine like terms: 6.065486251 + 0.888888889 = 6.95437514 x = 6.95437514 Simplifying x = 6.95437514

Subproblem 2

x + -0.888888889 = -6.065486251 Simplifying x + -0.888888889 = -6.065486251 Reorder the terms: -0.888888889 + x = -6.065486251 Solving -0.888888889 + x = -6.065486251 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.888888889' to each side of the equation. -0.888888889 + 0.888888889 + x = -6.065486251 + 0.888888889 Combine like terms: -0.888888889 + 0.888888889 = 0.000000000 0.000000000 + x = -6.065486251 + 0.888888889 x = -6.065486251 + 0.888888889 Combine like terms: -6.065486251 + 0.888888889 = -5.176597362 x = -5.176597362 Simplifying x = -5.176597362

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.95437514, -5.176597362}

See similar equations:

| 4+8x+5=-32x-26 | | 5X+26=7(x+2) | | 3c-6=7 | | 4x-6=7x-15 | | =w/2.2 | | 3+1-3x=2+-4x+7 | | -12y=2y | | 7x-(9x+7)=9-(4x-5) | | 8x+4+4x-3=4+6x+4-4 | | 6.4=-1.6+1.6y | | 4.9=-0.98(c+1) | | 50-65= | | .75(d+6)=12 | | 2w^2-14w+24= | | 360=720-(30+2x)(24+2x) | | -31-4x=-5-5+1+5x | | 6(h-12)+5(h-13)=6 | | 225/t | | x+2x+39+x-11=180 | | -8y+8=-10y-12 | | -3-x=-21 | | 7+5a-4-1=14-8a | | 3x^4+x^3-2x^2=0 | | 9x-2(x+6)=30 | | Y=2x^2-14x+23 | | 4-8y=28 | | -6n-20=-2n+4+1-3n | | .11(v+5)=6 | | 1.3x+26=7.8 | | 100m-10=75m+115 | | 134/50 | | 6(h-12)+5(h-13)= |

Equations solver categories