9rd^4-9rk^2=

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Solution for 9rd^4-9rk^2= equation: 


Simplifying
9rd4 + -9rk2 = 0

Solving
9d4r + -9k2r = 0

Solving for variable 'd'.

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

Add '9k2r' to each side of the equation.
9d4r + -9k2r + 9k2r = 0 + 9k2r

Combine like terms: -9k2r + 9k2r = 0
9d4r + 0 = 0 + 9k2r
9d4r = 0 + 9k2r
Remove the zero:
9d4r = 9k2r

Divide each side by '9r'.
d4 = k2

Simplifying
d4 = k2

Combine like terms: k2 + -1k2 = 0
d4 + -1k2 = 0

Factor a difference between two squares.
(d2 + k)(d2 + -1k) = 0


Subproblem 1
Set the factor '(d2 + k)' equal to zero and attempt to solve:

Simplifying
d2 + k = 0

Solving
d2 + k = 0

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

Add '-1k' to each side of the equation.
d2 + k + -1k = 0 + -1k

Combine like terms: k + -1k = 0
d2 + 0 = 0 + -1k
d2 = 0 + -1k
Remove the zero:
d2 = -1k

Simplifying
d2 = -1k

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.

Subproblem 2
Set the factor '(d2 + -1k)' equal to zero and attempt to solve:

Simplifying
d2 + -1k = 0

Solving
d2 + -1k = 0

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

Add 'k' to each side of the equation.
d2 + -1k + k = 0 + k

Combine like terms: -1k + k = 0
d2 + 0 = 0 + k
d2 = 0 + k
Remove the zero:
d2 = k

Simplifying
d2 = k

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.

The solution to this equation could not be determined.

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