-5x+23=-x^2-8x-15

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Solution for -5x+23=-x^2-8x-15 equation:


Simplifying
-5x + 23 = -1x2 + -8x + -15

Reorder the terms:
23 + -5x = -1x2 + -8x + -15

Reorder the terms:
23 + -5x = -15 + -8x + -1x2

Solving
23 + -5x = -15 + -8x + -1x2

Solving for variable 'x'.

Reorder the terms:
23 + 15 + -5x + 8x + x2 = -15 + -8x + -1x2 + 15 + 8x + x2

Combine like terms: 23 + 15 = 38
38 + -5x + 8x + x2 = -15 + -8x + -1x2 + 15 + 8x + x2

Combine like terms: -5x + 8x = 3x
38 + 3x + x2 = -15 + -8x + -1x2 + 15 + 8x + x2

Reorder the terms:
38 + 3x + x2 = -15 + 15 + -8x + 8x + -1x2 + x2

Combine like terms: -15 + 15 = 0
38 + 3x + x2 = 0 + -8x + 8x + -1x2 + x2
38 + 3x + x2 = -8x + 8x + -1x2 + x2

Combine like terms: -8x + 8x = 0
38 + 3x + x2 = 0 + -1x2 + x2
38 + 3x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
38 + 3x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-38' to each side of the equation.
38 + 3x + -38 + x2 = 0 + -38

Reorder the terms:
38 + -38 + 3x + x2 = 0 + -38

Combine like terms: 38 + -38 = 0
0 + 3x + x2 = 0 + -38
3x + x2 = 0 + -38

Combine like terms: 0 + -38 = -38
3x + x2 = -38

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = -38 + 2.25

Reorder the terms:
2.25 + 3x + x2 = -38 + 2.25

Combine like terms: -38 + 2.25 = -35.75
2.25 + 3x + x2 = -35.75

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = -35.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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