164=0.93(x^2)+2.2x+130

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Solution for 164=0.93(x^2)+2.2x+130 equation:


Simplifying
164 = 0.93(x2) + 2.2x + 130

Reorder the terms:
164 = 130 + 2.2x + 0.93x2

Solving
164 = 130 + 2.2x + 0.93x2

Solving for variable 'x'.

Combine like terms: 164 + -130 = 34
34 + -2.2x + -0.93x2 = 130 + 2.2x + 0.93x2 + -130 + -2.2x + -0.93x2

Reorder the terms:
34 + -2.2x + -0.93x2 = 130 + -130 + 2.2x + -2.2x + 0.93x2 + -0.93x2

Combine like terms: 130 + -130 = 0
34 + -2.2x + -0.93x2 = 0 + 2.2x + -2.2x + 0.93x2 + -0.93x2
34 + -2.2x + -0.93x2 = 2.2x + -2.2x + 0.93x2 + -0.93x2

Combine like terms: 2.2x + -2.2x = 0.0
34 + -2.2x + -0.93x2 = 0.0 + 0.93x2 + -0.93x2
34 + -2.2x + -0.93x2 = 0.93x2 + -0.93x2

Combine like terms: 0.93x2 + -0.93x2 = 0.00
34 + -2.2x + -0.93x2 = 0.00

Begin completing the square.  Divide all terms by
-0.93 the coefficient of the squared term: 

Divide each side by '-0.93'.
-36.55913978 + 2.365591398x + x2 = 0

Move the constant term to the right:

Add '36.55913978' to each side of the equation.
-36.55913978 + 2.365591398x + 36.55913978 + x2 = 0 + 36.55913978

Reorder the terms:
-36.55913978 + 36.55913978 + 2.365591398x + x2 = 0 + 36.55913978

Combine like terms: -36.55913978 + 36.55913978 = 0.00000000
0.00000000 + 2.365591398x + x2 = 0 + 36.55913978
2.365591398x + x2 = 0 + 36.55913978

Combine like terms: 0 + 36.55913978 = 36.55913978
2.365591398x + x2 = 36.55913978

The x term is 2.365591398x.  Take half its coefficient (1.182795699).
Square it (1.399005666) and add it to both sides.

Add '1.399005666' to each side of the equation.
2.365591398x + 1.399005666 + x2 = 36.55913978 + 1.399005666

Reorder the terms:
1.399005666 + 2.365591398x + x2 = 36.55913978 + 1.399005666

Combine like terms: 36.55913978 + 1.399005666 = 37.958145446
1.399005666 + 2.365591398x + x2 = 37.958145446

Factor a perfect square on the left side:
(x + 1.182795699)(x + 1.182795699) = 37.958145446

Calculate the square root of the right side: 6.161018215

Break this problem into two subproblems by setting 
(x + 1.182795699) equal to 6.161018215 and -6.161018215.

Subproblem 1

x + 1.182795699 = 6.161018215 Simplifying x + 1.182795699 = 6.161018215 Reorder the terms: 1.182795699 + x = 6.161018215 Solving 1.182795699 + x = 6.161018215 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.182795699' to each side of the equation. 1.182795699 + -1.182795699 + x = 6.161018215 + -1.182795699 Combine like terms: 1.182795699 + -1.182795699 = 0.000000000 0.000000000 + x = 6.161018215 + -1.182795699 x = 6.161018215 + -1.182795699 Combine like terms: 6.161018215 + -1.182795699 = 4.978222516 x = 4.978222516 Simplifying x = 4.978222516

Subproblem 2

x + 1.182795699 = -6.161018215 Simplifying x + 1.182795699 = -6.161018215 Reorder the terms: 1.182795699 + x = -6.161018215 Solving 1.182795699 + x = -6.161018215 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.182795699' to each side of the equation. 1.182795699 + -1.182795699 + x = -6.161018215 + -1.182795699 Combine like terms: 1.182795699 + -1.182795699 = 0.000000000 0.000000000 + x = -6.161018215 + -1.182795699 x = -6.161018215 + -1.182795699 Combine like terms: -6.161018215 + -1.182795699 = -7.343813914 x = -7.343813914 Simplifying x = -7.343813914

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.978222516, -7.343813914}

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