16x^2+20x+9=0

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Solution for 16x^2+20x+9=0 equation:


Simplifying
16x2 + 20x + 9 = 0

Reorder the terms:
9 + 20x + 16x2 = 0

Solving
9 + 20x + 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'.
0.5625 + 1.25x + x2 = 0

Move the constant term to the right:

Add '-0.5625' to each side of the equation.
0.5625 + 1.25x + -0.5625 + x2 = 0 + -0.5625

Reorder the terms:
0.5625 + -0.5625 + 1.25x + x2 = 0 + -0.5625

Combine like terms: 0.5625 + -0.5625 = 0.0000
0.0000 + 1.25x + x2 = 0 + -0.5625
1.25x + x2 = 0 + -0.5625

Combine like terms: 0 + -0.5625 = -0.5625
1.25x + x2 = -0.5625

The x term is 1.25x.  Take half its coefficient (0.625).
Square it (0.390625) and add it to both sides.

Add '0.390625' to each side of the equation.
1.25x + 0.390625 + x2 = -0.5625 + 0.390625

Reorder the terms:
0.390625 + 1.25x + x2 = -0.5625 + 0.390625

Combine like terms: -0.5625 + 0.390625 = -0.171875
0.390625 + 1.25x + x2 = -0.171875

Factor a perfect square on the left side:
(x + 0.625)(x + 0.625) = -0.171875

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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