a^2+10a-16=0

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Solution for a^2+10a-16=0 equation:


Simplifying
a2 + 10a + -16 = 0

Reorder the terms:
-16 + 10a + a2 = 0

Solving
-16 + 10a + a2 = 0

Solving for variable 'a'.

Begin completing the square.

Move the constant term to the right:

Add '16' to each side of the equation.
-16 + 10a + 16 + a2 = 0 + 16

Reorder the terms:
-16 + 16 + 10a + a2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + 10a + a2 = 0 + 16
10a + a2 = 0 + 16

Combine like terms: 0 + 16 = 16
10a + a2 = 16

The a term is 10a.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10a + 25 + a2 = 16 + 25

Reorder the terms:
25 + 10a + a2 = 16 + 25

Combine like terms: 16 + 25 = 41
25 + 10a + a2 = 41

Factor a perfect square on the left side:
(a + 5)(a + 5) = 41

Calculate the square root of the right side: 6.403124237

Break this problem into two subproblems by setting 
(a + 5) equal to 6.403124237 and -6.403124237.

Subproblem 1

a + 5 = 6.403124237 Simplifying a + 5 = 6.403124237 Reorder the terms: 5 + a = 6.403124237 Solving 5 + a = 6.403124237 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + a = 6.403124237 + -5 Combine like terms: 5 + -5 = 0 0 + a = 6.403124237 + -5 a = 6.403124237 + -5 Combine like terms: 6.403124237 + -5 = 1.403124237 a = 1.403124237 Simplifying a = 1.403124237

Subproblem 2

a + 5 = -6.403124237 Simplifying a + 5 = -6.403124237 Reorder the terms: 5 + a = -6.403124237 Solving 5 + a = -6.403124237 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + a = -6.403124237 + -5 Combine like terms: 5 + -5 = 0 0 + a = -6.403124237 + -5 a = -6.403124237 + -5 Combine like terms: -6.403124237 + -5 = -11.403124237 a = -11.403124237 Simplifying a = -11.403124237

Solution

The solution to the problem is based on the solutions from the subproblems. a = {1.403124237, -11.403124237}

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