2a^2+16a=36

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Solution for 2a^2+16a=36 equation:


Simplifying
2a2 + 16a = 36

Reorder the terms:
16a + 2a2 = 36

Solving
16a + 2a2 = 36

Solving for variable 'a'.

Reorder the terms:
-36 + 16a + 2a2 = 36 + -36

Combine like terms: 36 + -36 = 0
-36 + 16a + 2a2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-18 + 8a + a2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-18 + 8a + a2)' equal to zero and attempt to solve: Simplifying -18 + 8a + a2 = 0 Solving -18 + 8a + a2 = 0 Begin completing the square. Move the constant term to the right: Add '18' to each side of the equation. -18 + 8a + 18 + a2 = 0 + 18 Reorder the terms: -18 + 18 + 8a + a2 = 0 + 18 Combine like terms: -18 + 18 = 0 0 + 8a + a2 = 0 + 18 8a + a2 = 0 + 18 Combine like terms: 0 + 18 = 18 8a + a2 = 18 The a term is 8a. Take half its coefficient (4). Square it (16) and add it to both sides. Add '16' to each side of the equation. 8a + 16 + a2 = 18 + 16 Reorder the terms: 16 + 8a + a2 = 18 + 16 Combine like terms: 18 + 16 = 34 16 + 8a + a2 = 34 Factor a perfect square on the left side: (a + 4)(a + 4) = 34 Calculate the square root of the right side: 5.830951895 Break this problem into two subproblems by setting (a + 4) equal to 5.830951895 and -5.830951895.

Subproblem 1

a + 4 = 5.830951895 Simplifying a + 4 = 5.830951895 Reorder the terms: 4 + a = 5.830951895 Solving 4 + a = 5.830951895 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + a = 5.830951895 + -4 Combine like terms: 4 + -4 = 0 0 + a = 5.830951895 + -4 a = 5.830951895 + -4 Combine like terms: 5.830951895 + -4 = 1.830951895 a = 1.830951895 Simplifying a = 1.830951895

Subproblem 2

a + 4 = -5.830951895 Simplifying a + 4 = -5.830951895 Reorder the terms: 4 + a = -5.830951895 Solving 4 + a = -5.830951895 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + a = -5.830951895 + -4 Combine like terms: 4 + -4 = 0 0 + a = -5.830951895 + -4 a = -5.830951895 + -4 Combine like terms: -5.830951895 + -4 = -9.830951895 a = -9.830951895 Simplifying a = -9.830951895

Solution

The solution to the problem is based on the solutions from the subproblems. a = {1.830951895, -9.830951895}

Solution

a = {1.830951895, -9.830951895}

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