86400=(30*x*x)*(x-7)

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Solution for 86400=(30*x*x)*(x-7) equation: 


Simplifying
86400 = (30x * x)(x + -7)

Multiply x * x
86400 = (30x2)(x + -7)

Remove parenthesis around (30x2)
86400 = 30x2(x + -7)

Reorder the terms:
86400 = 30x2(-7 + x)
86400 = (-7 * 30x2 + x * 30x2)
86400 = (-210x2 + 30x3)

Solving
86400 = -210x2 + 30x3

Solving for variable 'x'.

Reorder the terms:
86400 + 210x2 + -30x3 = -210x2 + 210x2 + 30x3 + -30x3

Combine like terms: -210x2 + 210x2 = 0
86400 + 210x2 + -30x3 = 0 + 30x3 + -30x3
86400 + 210x2 + -30x3 = 30x3 + -30x3

Combine like terms: 30x3 + -30x3 = 0
86400 + 210x2 + -30x3 = 0

Factor out the Greatest Common Factor (GCF), '30'.
30(2880 + 7x2 + -1x3) = 0

Ignore the factor 30.

Subproblem 1
Set the factor '(2880 + 7x2 + -1x3)' equal to zero and attempt to solve:

Simplifying
2880 + 7x2 + -1x3 = 0

Solving
2880 + 7x2 + -1x3 = 0

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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