x^2+5x+78=4

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Solution for x^2+5x+78=4 equation:


Simplifying
x2 + 5x + 78 = 4

Reorder the terms:
78 + 5x + x2 = 4

Solving
78 + 5x + x2 = 4

Solving for variable 'x'.

Reorder the terms:
78 + -4 + 5x + x2 = 4 + -4

Combine like terms: 78 + -4 = 74
74 + 5x + x2 = 4 + -4

Combine like terms: 4 + -4 = 0
74 + 5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-74' to each side of the equation.
74 + 5x + -74 + x2 = 0 + -74

Reorder the terms:
74 + -74 + 5x + x2 = 0 + -74

Combine like terms: 74 + -74 = 0
0 + 5x + x2 = 0 + -74
5x + x2 = 0 + -74

Combine like terms: 0 + -74 = -74
5x + x2 = -74

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = -74 + 6.25

Reorder the terms:
6.25 + 5x + x2 = -74 + 6.25

Combine like terms: -74 + 6.25 = -67.75
6.25 + 5x + x2 = -67.75

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = -67.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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