0.3x+17=x^2-16

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Solution for 0.3x+17=x^2-16 equation:


Simplifying
0.3x + 17 = x2 + -16

Reorder the terms:
17 + 0.3x = x2 + -16

Reorder the terms:
17 + 0.3x = -16 + x2

Solving
17 + 0.3x = -16 + x2

Solving for variable 'x'.

Reorder the terms:
17 + 16 + 0.3x + -1x2 = -16 + x2 + 16 + -1x2

Combine like terms: 17 + 16 = 33
33 + 0.3x + -1x2 = -16 + x2 + 16 + -1x2

Reorder the terms:
33 + 0.3x + -1x2 = -16 + 16 + x2 + -1x2

Combine like terms: -16 + 16 = 0
33 + 0.3x + -1x2 = 0 + x2 + -1x2
33 + 0.3x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
33 + 0.3x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-33 + -0.3x + x2 = 0

Move the constant term to the right:

Add '33' to each side of the equation.
-33 + -0.3x + 33 + x2 = 0 + 33

Reorder the terms:
-33 + 33 + -0.3x + x2 = 0 + 33

Combine like terms: -33 + 33 = 0
0 + -0.3x + x2 = 0 + 33
-0.3x + x2 = 0 + 33

Combine like terms: 0 + 33 = 33
-0.3x + x2 = 33

The x term is -0.3x.  Take half its coefficient (-0.15).
Square it (0.0225) and add it to both sides.

Add '0.0225' to each side of the equation.
-0.3x + 0.0225 + x2 = 33 + 0.0225

Reorder the terms:
0.0225 + -0.3x + x2 = 33 + 0.0225

Combine like terms: 33 + 0.0225 = 33.0225
0.0225 + -0.3x + x2 = 33.0225

Factor a perfect square on the left side:
(x + -0.15)(x + -0.15) = 33.0225

Calculate the square root of the right side: 5.746520686

Break this problem into two subproblems by setting 
(x + -0.15) equal to 5.746520686 and -5.746520686.

Subproblem 1

x + -0.15 = 5.746520686 Simplifying x + -0.15 = 5.746520686 Reorder the terms: -0.15 + x = 5.746520686 Solving -0.15 + x = 5.746520686 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.15' to each side of the equation. -0.15 + 0.15 + x = 5.746520686 + 0.15 Combine like terms: -0.15 + 0.15 = 0.00 0.00 + x = 5.746520686 + 0.15 x = 5.746520686 + 0.15 Combine like terms: 5.746520686 + 0.15 = 5.896520686 x = 5.896520686 Simplifying x = 5.896520686

Subproblem 2

x + -0.15 = -5.746520686 Simplifying x + -0.15 = -5.746520686 Reorder the terms: -0.15 + x = -5.746520686 Solving -0.15 + x = -5.746520686 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.15' to each side of the equation. -0.15 + 0.15 + x = -5.746520686 + 0.15 Combine like terms: -0.15 + 0.15 = 0.00 0.00 + x = -5.746520686 + 0.15 x = -5.746520686 + 0.15 Combine like terms: -5.746520686 + 0.15 = -5.596520686 x = -5.596520686 Simplifying x = -5.596520686

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.896520686, -5.596520686}

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