40a^2+20a-30=(-1)(15a^3+30)

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Solution for 40a^2+20a-30=(-1)(15a^3+30) equation:


Simplifying
40a2 + 20a + -30 = (-1)(15a3 + 30)

Reorder the terms:
-30 + 20a + 40a2 = (-1)(15a3 + 30)

Reorder the terms:
-30 + 20a + 40a2 = -1(30 + 15a3)
-30 + 20a + 40a2 = (30 * -1 + 15a3 * -1)
-30 + 20a + 40a2 = (-30 + -15a3)

Add '30' to each side of the equation.
-30 + 20a + 30 + 40a2 = -30 + 30 + -15a3

Reorder the terms:
-30 + 30 + 20a + 40a2 = -30 + 30 + -15a3

Combine like terms: -30 + 30 = 0
0 + 20a + 40a2 = -30 + 30 + -15a3
20a + 40a2 = -30 + 30 + -15a3

Combine like terms: -30 + 30 = 0
20a + 40a2 = 0 + -15a3
20a + 40a2 = -15a3

Solving
20a + 40a2 = -15a3

Solving for variable 'a'.

Combine like terms: -15a3 + 15a3 = 0
20a + 40a2 + 15a3 = 0

Factor out the Greatest Common Factor (GCF), '5a'.
5a(4 + 8a + 3a2) = 0

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

Ignore the factor 5.

Subproblem 1

Set the factor 'a' equal to zero and attempt to solve: Simplifying a = 0 Solving a = 0 Move all terms containing a to the left, all other terms to the right. Simplifying a = 0

Subproblem 2

Set the factor '(2 + a)' equal to zero and attempt to solve: Simplifying 2 + a = 0 Solving 2 + a = 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 + a = 0 + -2 Combine like terms: 2 + -2 = 0 0 + a = 0 + -2 a = 0 + -2 Combine like terms: 0 + -2 = -2 a = -2 Simplifying a = -2

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 = {0, -2, -0.6666666667}

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