21a^7+10a^6+9a^8=0

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Solution for 21a^7+10a^6+9a^8=0 equation:


Simplifying
21a7 + 10a6 + 9a8 = 0

Reorder the terms:
10a6 + 21a7 + 9a8 = 0

Solving
10a6 + 21a7 + 9a8 = 0

Solving for variable 'a'.

Factor out the Greatest Common Factor (GCF), 'a6'.
a6(10 + 21a + 9a2) = 0

Factor a trinomial.
a6((5 + 3a)(2 + 3a)) = 0

Subproblem 1

Set the factor 'a6' equal to zero and attempt to solve: Simplifying a6 = 0 Solving a6 = 0 Move all terms containing a to the left, all other terms to the right. Simplifying a6 = 0 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 '(5 + 3a)' equal to zero and attempt to solve: Simplifying 5 + 3a = 0 Solving 5 + 3a = 0 Move all terms containing a to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 3a = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 3a = 0 + -5 3a = 0 + -5 Combine like terms: 0 + -5 = -5 3a = -5 Divide each side by '3'. a = -1.666666667 Simplifying a = -1.666666667

Subproblem 3

Set the factor '(2 + 3a)' equal to zero and attempt to solve: Simplifying 2 + 3a = 0 Solving 2 + 3a = 0 Move all terms containing a to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + 3a = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 3a = 0 + -2 3a = 0 + -2 Combine like terms: 0 + -2 = -2 3a = -2 Divide each side by '3'. a = -0.6666666667 Simplifying a = -0.6666666667

Solution

a = {-1.666666667, -0.6666666667}

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