a^2+4a-360=0

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Solution for a^2+4a-360=0 equation:


Simplifying
a2 + 4a + -360 = 0

Reorder the terms:
-360 + 4a + a2 = 0

Solving
-360 + 4a + a2 = 0

Solving for variable 'a'.

Begin completing the square.

Move the constant term to the right:

Add '360' to each side of the equation.
-360 + 4a + 360 + a2 = 0 + 360

Reorder the terms:
-360 + 360 + 4a + a2 = 0 + 360

Combine like terms: -360 + 360 = 0
0 + 4a + a2 = 0 + 360
4a + a2 = 0 + 360

Combine like terms: 0 + 360 = 360
4a + a2 = 360

The a term is 4a.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4a + 4 + a2 = 360 + 4

Reorder the terms:
4 + 4a + a2 = 360 + 4

Combine like terms: 360 + 4 = 364
4 + 4a + a2 = 364

Factor a perfect square on the left side:
(a + 2)(a + 2) = 364

Calculate the square root of the right side: 19.078784028

Break this problem into two subproblems by setting 
(a + 2) equal to 19.078784028 and -19.078784028.

Subproblem 1

a + 2 = 19.078784028 Simplifying a + 2 = 19.078784028 Reorder the terms: 2 + a = 19.078784028 Solving 2 + a = 19.078784028 Solving for variable 'a'. 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 = 19.078784028 + -2 Combine like terms: 2 + -2 = 0 0 + a = 19.078784028 + -2 a = 19.078784028 + -2 Combine like terms: 19.078784028 + -2 = 17.078784028 a = 17.078784028 Simplifying a = 17.078784028

Subproblem 2

a + 2 = -19.078784028 Simplifying a + 2 = -19.078784028 Reorder the terms: 2 + a = -19.078784028 Solving 2 + a = -19.078784028 Solving for variable 'a'. 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 = -19.078784028 + -2 Combine like terms: 2 + -2 = 0 0 + a = -19.078784028 + -2 a = -19.078784028 + -2 Combine like terms: -19.078784028 + -2 = -21.078784028 a = -21.078784028 Simplifying a = -21.078784028

Solution

The solution to the problem is based on the solutions from the subproblems. a = {17.078784028, -21.078784028}

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