5a^8-15a^7-140a^6=

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Solution for 5a^8-15a^7-140a^6= equation:


Simplifying
5a8 + -15a7 + -140a6 = 0

Reorder the terms:
-140a6 + -15a7 + 5a8 = 0

Solving
-140a6 + -15a7 + 5a8 = 0

Solving for variable 'a'.

Factor out the Greatest Common Factor (GCF), '5a6'.
5a6(-28 + -3a + a2) = 0

Factor a trinomial.
5a6((-4 + -1a)(7 + -1a)) = 0

Ignore the factor 5.

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 '(-4 + -1a)' equal to zero and attempt to solve: Simplifying -4 + -1a = 0 Solving -4 + -1a = 0 Move all terms containing a to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -1a = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1a = 0 + 4 -1a = 0 + 4 Combine like terms: 0 + 4 = 4 -1a = 4 Divide each side by '-1'. a = -4 Simplifying a = -4

Subproblem 3

Set the factor '(7 + -1a)' equal to zero and attempt to solve: Simplifying 7 + -1a = 0 Solving 7 + -1a = 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 + -1a = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1a = 0 + -7 -1a = 0 + -7 Combine like terms: 0 + -7 = -7 -1a = -7 Divide each side by '-1'. a = 7 Simplifying a = 7

Solution

a = {-4, 7}

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