20a^7+21a^6+4a^8=

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Solution for 20a^7+21a^6+4a^8= equation:


Simplifying
20a7 + 21a6 + 4a8 = 0

Reorder the terms:
21a6 + 20a7 + 4a8 = 0

Solving
21a6 + 20a7 + 4a8 = 0

Solving for variable 'a'.

Factor out the Greatest Common Factor (GCF), 'a6'.
a6(21 + 20a + 4a2) = 0

Factor a trinomial.
a6((7 + 2a)(3 + 2a)) = 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 '(7 + 2a)' equal to zero and attempt to solve: Simplifying 7 + 2a = 0 Solving 7 + 2a = 0 Move all terms containing a to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 2a = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 2a = 0 + -7 2a = 0 + -7 Combine like terms: 0 + -7 = -7 2a = -7 Divide each side by '2'. a = -3.5 Simplifying a = -3.5

Subproblem 3

Set the factor '(3 + 2a)' equal to zero and attempt to solve: Simplifying 3 + 2a = 0 Solving 3 + 2a = 0 Move all terms containing a to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 2a = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 2a = 0 + -3 2a = 0 + -3 Combine like terms: 0 + -3 = -3 2a = -3 Divide each side by '2'. a = -1.5 Simplifying a = -1.5

Solution

a = {-3.5, -1.5}

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