=9-(17.54x)-(1.54)x^2

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Solution for =9-(17.54x)-(1.54)x^2 equation:


Simplifying
0 = 9 + -1(17.54x) + -1(1.54) * x2

Remove parenthesis around (17.54x)
0 = 9 + -1 * 17.54x + -1(1.54) * x2

Multiply -1 * 17.54
0 = 9 + -17.54x + -1(1.54) * x2

Multiply -1 * 1.54
0 = 9 + -17.54x + -1.54x2

Solving
0 = 9 + -17.54x + -1.54x2

Solving for variable 'x'.

Combine like terms: 0 + -9 = -9
-9 + 17.54x + 1.54x2 = 9 + -17.54x + -1.54x2 + -9 + 17.54x + 1.54x2

Reorder the terms:
-9 + 17.54x + 1.54x2 = 9 + -9 + -17.54x + 17.54x + -1.54x2 + 1.54x2

Combine like terms: 9 + -9 = 0
-9 + 17.54x + 1.54x2 = 0 + -17.54x + 17.54x + -1.54x2 + 1.54x2
-9 + 17.54x + 1.54x2 = -17.54x + 17.54x + -1.54x2 + 1.54x2

Combine like terms: -17.54x + 17.54x = 0.00
-9 + 17.54x + 1.54x2 = 0.00 + -1.54x2 + 1.54x2
-9 + 17.54x + 1.54x2 = -1.54x2 + 1.54x2

Combine like terms: -1.54x2 + 1.54x2 = 0.00
-9 + 17.54x + 1.54x2 = 0.00

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

Divide each side by '1.54'.
-5.844155844 + 11.38961039x + x2 = 0

Move the constant term to the right:

Add '5.844155844' to each side of the equation.
-5.844155844 + 11.38961039x + 5.844155844 + x2 = 0 + 5.844155844

Reorder the terms:
-5.844155844 + 5.844155844 + 11.38961039x + x2 = 0 + 5.844155844

Combine like terms: -5.844155844 + 5.844155844 = 0.000000000
0.000000000 + 11.38961039x + x2 = 0 + 5.844155844
11.38961039x + x2 = 0 + 5.844155844

Combine like terms: 0 + 5.844155844 = 5.844155844
11.38961039x + x2 = 5.844155844

The x term is 11.38961039x.  Take half its coefficient (5.694805195).
Square it (32.43080621) and add it to both sides.

Add '32.43080621' to each side of the equation.
11.38961039x + 32.43080621 + x2 = 5.844155844 + 32.43080621

Reorder the terms:
32.43080621 + 11.38961039x + x2 = 5.844155844 + 32.43080621

Combine like terms: 5.844155844 + 32.43080621 = 38.274962054
32.43080621 + 11.38961039x + x2 = 38.274962054

Factor a perfect square on the left side:
(x + 5.694805195)(x + 5.694805195) = 38.274962054

Calculate the square root of the right side: 6.186676172

Break this problem into two subproblems by setting 
(x + 5.694805195) equal to 6.186676172 and -6.186676172.

Subproblem 1

x + 5.694805195 = 6.186676172 Simplifying x + 5.694805195 = 6.186676172 Reorder the terms: 5.694805195 + x = 6.186676172 Solving 5.694805195 + x = 6.186676172 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.694805195' to each side of the equation. 5.694805195 + -5.694805195 + x = 6.186676172 + -5.694805195 Combine like terms: 5.694805195 + -5.694805195 = 0.000000000 0.000000000 + x = 6.186676172 + -5.694805195 x = 6.186676172 + -5.694805195 Combine like terms: 6.186676172 + -5.694805195 = 0.491870977 x = 0.491870977 Simplifying x = 0.491870977

Subproblem 2

x + 5.694805195 = -6.186676172 Simplifying x + 5.694805195 = -6.186676172 Reorder the terms: 5.694805195 + x = -6.186676172 Solving 5.694805195 + x = -6.186676172 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.694805195' to each side of the equation. 5.694805195 + -5.694805195 + x = -6.186676172 + -5.694805195 Combine like terms: 5.694805195 + -5.694805195 = 0.000000000 0.000000000 + x = -6.186676172 + -5.694805195 x = -6.186676172 + -5.694805195 Combine like terms: -6.186676172 + -5.694805195 = -11.881481367 x = -11.881481367 Simplifying x = -11.881481367

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.491870977, -11.881481367}

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