4x^2+25x+120=0

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Solution for 4x^2+25x+120=0 equation:


Simplifying
4x2 + 25x + 120 = 0

Reorder the terms:
120 + 25x + 4x2 = 0

Solving
120 + 25x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
30 + 6.25x + x2 = 0

Move the constant term to the right:

Add '-30' to each side of the equation.
30 + 6.25x + -30 + x2 = 0 + -30

Reorder the terms:
30 + -30 + 6.25x + x2 = 0 + -30

Combine like terms: 30 + -30 = 0
0 + 6.25x + x2 = 0 + -30
6.25x + x2 = 0 + -30

Combine like terms: 0 + -30 = -30
6.25x + x2 = -30

The x term is 6.25x.  Take half its coefficient (3.125).
Square it (9.765625) and add it to both sides.

Add '9.765625' to each side of the equation.
6.25x + 9.765625 + x2 = -30 + 9.765625

Reorder the terms:
9.765625 + 6.25x + x2 = -30 + 9.765625

Combine like terms: -30 + 9.765625 = -20.234375
9.765625 + 6.25x + x2 = -20.234375

Factor a perfect square on the left side:
(x + 3.125)(x + 3.125) = -20.234375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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