x+3-6x-18=5x^2-9

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Solution for x+3-6x-18=5x^2-9 equation:


Simplifying
x + 3 + -6x + -18 = 5x2 + -9

Reorder the terms:
3 + -18 + x + -6x = 5x2 + -9

Combine like terms: 3 + -18 = -15
-15 + x + -6x = 5x2 + -9

Combine like terms: x + -6x = -5x
-15 + -5x = 5x2 + -9

Reorder the terms:
-15 + -5x = -9 + 5x2

Solving
-15 + -5x = -9 + 5x2

Solving for variable 'x'.

Reorder the terms:
-15 + 9 + -5x + -5x2 = -9 + 5x2 + 9 + -5x2

Combine like terms: -15 + 9 = -6
-6 + -5x + -5x2 = -9 + 5x2 + 9 + -5x2

Reorder the terms:
-6 + -5x + -5x2 = -9 + 9 + 5x2 + -5x2

Combine like terms: -9 + 9 = 0
-6 + -5x + -5x2 = 0 + 5x2 + -5x2
-6 + -5x + -5x2 = 5x2 + -5x2

Combine like terms: 5x2 + -5x2 = 0
-6 + -5x + -5x2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(6 + 5x + 5x2) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(6 + 5x + 5x2)' equal to zero and attempt to solve: Simplifying 6 + 5x + 5x2 = 0 Solving 6 + 5x + 5x2 = 0 Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. 1.2 + x + x2 = 0 Move the constant term to the right: Add '-1.2' to each side of the equation. 1.2 + x + -1.2 + x2 = 0 + -1.2 Reorder the terms: 1.2 + -1.2 + x + x2 = 0 + -1.2 Combine like terms: 1.2 + -1.2 = 0.0 0.0 + x + x2 = 0 + -1.2 x + x2 = 0 + -1.2 Combine like terms: 0 + -1.2 = -1.2 x + x2 = -1.2 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 = -1.2 + 0.25 Combine like terms: + 0.25 = 1.25 1.25 + x2 = -1.2 + 0.25 Combine like terms: -1.2 + 0.25 = -0.95 1.25 + x2 = -0.95 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = -0.95 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

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