5a(2a+12)=180

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Solution for 5a(2a+12)=180 equation:


Simplifying
5a(2a + 12) = 180

Reorder the terms:
5a(12 + 2a) = 180
(12 * 5a + 2a * 5a) = 180
(60a + 10a2) = 180

Solving
60a + 10a2 = 180

Solving for variable 'a'.

Reorder the terms:
-180 + 60a + 10a2 = 180 + -180

Combine like terms: 180 + -180 = 0
-180 + 60a + 10a2 = 0

Factor out the Greatest Common Factor (GCF), '10'.
10(-18 + 6a + a2) = 0

Ignore the factor 10.

Subproblem 1

Set the factor '(-18 + 6a + a2)' equal to zero and attempt to solve: Simplifying -18 + 6a + a2 = 0 Solving -18 + 6a + a2 = 0 Begin completing the square. Move the constant term to the right: Add '18' to each side of the equation. -18 + 6a + 18 + a2 = 0 + 18 Reorder the terms: -18 + 18 + 6a + a2 = 0 + 18 Combine like terms: -18 + 18 = 0 0 + 6a + a2 = 0 + 18 6a + a2 = 0 + 18 Combine like terms: 0 + 18 = 18 6a + a2 = 18 The a term is 6a. Take half its coefficient (3). Square it (9) and add it to both sides. Add '9' to each side of the equation. 6a + 9 + a2 = 18 + 9 Reorder the terms: 9 + 6a + a2 = 18 + 9 Combine like terms: 18 + 9 = 27 9 + 6a + a2 = 27 Factor a perfect square on the left side: (a + 3)(a + 3) = 27 Calculate the square root of the right side: 5.196152423 Break this problem into two subproblems by setting (a + 3) equal to 5.196152423 and -5.196152423.

Subproblem 1

a + 3 = 5.196152423 Simplifying a + 3 = 5.196152423 Reorder the terms: 3 + a = 5.196152423 Solving 3 + a = 5.196152423 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + a = 5.196152423 + -3 Combine like terms: 3 + -3 = 0 0 + a = 5.196152423 + -3 a = 5.196152423 + -3 Combine like terms: 5.196152423 + -3 = 2.196152423 a = 2.196152423 Simplifying a = 2.196152423

Subproblem 2

a + 3 = -5.196152423 Simplifying a + 3 = -5.196152423 Reorder the terms: 3 + a = -5.196152423 Solving 3 + a = -5.196152423 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + a = -5.196152423 + -3 Combine like terms: 3 + -3 = 0 0 + a = -5.196152423 + -3 a = -5.196152423 + -3 Combine like terms: -5.196152423 + -3 = -8.196152423 a = -8.196152423 Simplifying a = -8.196152423

Solution

The solution to the problem is based on the solutions from the subproblems. a = {2.196152423, -8.196152423}

Solution

a = {2.196152423, -8.196152423}

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