a^2+8a-188=0

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Solution for a^2+8a-188=0 equation:


Simplifying
a2 + 8a + -188 = 0

Reorder the terms:
-188 + 8a + a2 = 0

Solving
-188 + 8a + a2 = 0

Solving for variable 'a'.

Begin completing the square.

Move the constant term to the right:

Add '188' to each side of the equation.
-188 + 8a + 188 + a2 = 0 + 188

Reorder the terms:
-188 + 188 + 8a + a2 = 0 + 188

Combine like terms: -188 + 188 = 0
0 + 8a + a2 = 0 + 188
8a + a2 = 0 + 188

Combine like terms: 0 + 188 = 188
8a + a2 = 188

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 = 188 + 16

Reorder the terms:
16 + 8a + a2 = 188 + 16

Combine like terms: 188 + 16 = 204
16 + 8a + a2 = 204

Factor a perfect square on the left side:
(a + 4)(a + 4) = 204

Calculate the square root of the right side: 14.282856857

Break this problem into two subproblems by setting 
(a + 4) equal to 14.282856857 and -14.282856857.

Subproblem 1

a + 4 = 14.282856857 Simplifying a + 4 = 14.282856857 Reorder the terms: 4 + a = 14.282856857 Solving 4 + a = 14.282856857 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 = 14.282856857 + -4 Combine like terms: 4 + -4 = 0 0 + a = 14.282856857 + -4 a = 14.282856857 + -4 Combine like terms: 14.282856857 + -4 = 10.282856857 a = 10.282856857 Simplifying a = 10.282856857

Subproblem 2

a + 4 = -14.282856857 Simplifying a + 4 = -14.282856857 Reorder the terms: 4 + a = -14.282856857 Solving 4 + a = -14.282856857 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 = -14.282856857 + -4 Combine like terms: 4 + -4 = 0 0 + a = -14.282856857 + -4 a = -14.282856857 + -4 Combine like terms: -14.282856857 + -4 = -18.282856857 a = -18.282856857 Simplifying a = -18.282856857

Solution

The solution to the problem is based on the solutions from the subproblems. a = {10.282856857, -18.282856857}

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