8(c^2)((4c^2)+5c+9)=

Solution for 8(c^2)((4c^2)+5c+9)= equation:

Simplifying
8(c2)((4c2) + 5c + 9) = 0

Reorder the terms:
8c2(9 + 5c + (4c2)) = 0
(9 * 8c2 + 5c * 8c2 + (4c2) * 8c2) = 0
(72c2 + 40c3 + 32c4) = 0

Solving
72c2 + 40c3 + 32c4 = 0

Solving for variable 'c'.

Factor out the Greatest Common Factor (GCF), '8c2'.
8c2(9 + 5c + 4c2) = 0

Ignore the factor 8.
Subproblem 1
Set the factor 'c2' equal to zero and attempt to solve:

Simplifying
c2 = 0

Solving
c2 = 0

Move all terms containing c to the left, all other terms to the right.

Simplifying
c2 = 0

Take the square root of each side:
c = {0}
Subproblem 2
Set the factor '(9 + 5c + 4c2)' equal to zero and attempt to solve:

Simplifying
9 + 5c + 4c2 = 0

Solving
9 + 5c + 4c2 = 0

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

Divide each side by '4'.
2.25 + 1.25c + c2 = 0

Move the constant term to the right:

Add '-2.25' to each side of the equation.
2.25 + 1.25c + -2.25 + c2 = 0 + -2.25

Reorder the terms:
2.25 + -2.25 + 1.25c + c2 = 0 + -2.25

Combine like terms: 2.25 + -2.25 = 0.00
0.00 + 1.25c + c2 = 0 + -2.25
1.25c + c2 = 0 + -2.25

Combine like terms: 0 + -2.25 = -2.25
1.25c + c2 = -2.25

The c term is 1.25c.  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.
1.25c + 0.390625 + c2 = -2.25 + 0.390625

Reorder the terms:
0.390625 + 1.25c + c2 = -2.25 + 0.390625

Combine like terms: -2.25 + 0.390625 = -1.859375
0.390625 + 1.25c + c2 = -1.859375

Factor a perfect square on the left side:
(c + 0.625)(c + 0.625) = -1.859375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.
Solution
c = {0}