2x^2+7x+72=0

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Solution for 2x^2+7x+72=0 equation:


Simplifying
2x2 + 7x + 72 = 0

Reorder the terms:
72 + 7x + 2x2 = 0

Solving
72 + 7x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
36 + 3.5x + x2 = 0

Move the constant term to the right:

Add '-36' to each side of the equation.
36 + 3.5x + -36 + x2 = 0 + -36

Reorder the terms:
36 + -36 + 3.5x + x2 = 0 + -36

Combine like terms: 36 + -36 = 0
0 + 3.5x + x2 = 0 + -36
3.5x + x2 = 0 + -36

Combine like terms: 0 + -36 = -36
3.5x + x2 = -36

The x term is 3.5x.  Take half its coefficient (1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
3.5x + 3.0625 + x2 = -36 + 3.0625

Reorder the terms:
3.0625 + 3.5x + x2 = -36 + 3.0625

Combine like terms: -36 + 3.0625 = -32.9375
3.0625 + 3.5x + x2 = -32.9375

Factor a perfect square on the left side:
(x + 1.75)(x + 1.75) = -32.9375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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