x^2+8x+16-5x+20=0

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Solution for x^2+8x+16-5x+20=0 equation:


Simplifying
x2 + 8x + 16 + -5x + 20 = 0

Reorder the terms:
16 + 20 + 8x + -5x + x2 = 0

Combine like terms: 16 + 20 = 36
36 + 8x + -5x + x2 = 0

Combine like terms: 8x + -5x = 3x
36 + 3x + x2 = 0

Solving
36 + 3x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-36' to each side of the equation.
36 + 3x + -36 + x2 = 0 + -36

Reorder the terms:
36 + -36 + 3x + x2 = 0 + -36

Combine like terms: 36 + -36 = 0
0 + 3x + x2 = 0 + -36
3x + x2 = 0 + -36

Combine like terms: 0 + -36 = -36
3x + x2 = -36

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 = -36 + 2.25

Reorder the terms:
2.25 + 3x + x2 = -36 + 2.25

Combine like terms: -36 + 2.25 = -33.75
2.25 + 3x + x2 = -33.75

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = -33.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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