16x^2+21x+25=0

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Solution for 16x^2+21x+25=0 equation:


Simplifying
16x2 + 21x + 25 = 0

Reorder the terms:
25 + 21x + 16x2 = 0

Solving
25 + 21x + 16x2 = 0

Solving for variable 'x'.

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

Divide each side by '16'.
1.5625 + 1.3125x + x2 = 0

Move the constant term to the right:

Add '-1.5625' to each side of the equation.
1.5625 + 1.3125x + -1.5625 + x2 = 0 + -1.5625

Reorder the terms:
1.5625 + -1.5625 + 1.3125x + x2 = 0 + -1.5625

Combine like terms: 1.5625 + -1.5625 = 0.0000
0.0000 + 1.3125x + x2 = 0 + -1.5625
1.3125x + x2 = 0 + -1.5625

Combine like terms: 0 + -1.5625 = -1.5625
1.3125x + x2 = -1.5625

The x term is 1.3125x.  Take half its coefficient (0.65625).
Square it (0.4306640625) and add it to both sides.

Add '0.4306640625' to each side of the equation.
1.3125x + 0.4306640625 + x2 = -1.5625 + 0.4306640625

Reorder the terms:
0.4306640625 + 1.3125x + x2 = -1.5625 + 0.4306640625

Combine like terms: -1.5625 + 0.4306640625 = -1.1318359375
0.4306640625 + 1.3125x + x2 = -1.1318359375

Factor a perfect square on the left side:
(x + 0.65625)(x + 0.65625) = -1.1318359375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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