a^2+2a-48=-6

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Solution for a^2+2a-48=-6 equation:


Simplifying
a2 + 2a + -48 = -6

Reorder the terms:
-48 + 2a + a2 = -6

Solving
-48 + 2a + a2 = -6

Solving for variable 'a'.

Reorder the terms:
-48 + 6 + 2a + a2 = -6 + 6

Combine like terms: -48 + 6 = -42
-42 + 2a + a2 = -6 + 6

Combine like terms: -6 + 6 = 0
-42 + 2a + a2 = 0

Begin completing the square.

Move the constant term to the right:

Add '42' to each side of the equation.
-42 + 2a + 42 + a2 = 0 + 42

Reorder the terms:
-42 + 42 + 2a + a2 = 0 + 42

Combine like terms: -42 + 42 = 0
0 + 2a + a2 = 0 + 42
2a + a2 = 0 + 42

Combine like terms: 0 + 42 = 42
2a + a2 = 42

The a term is 2a.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2a + 1 + a2 = 42 + 1

Reorder the terms:
1 + 2a + a2 = 42 + 1

Combine like terms: 42 + 1 = 43
1 + 2a + a2 = 43

Factor a perfect square on the left side:
(a + 1)(a + 1) = 43

Calculate the square root of the right side: 6.557438524

Break this problem into two subproblems by setting 
(a + 1) equal to 6.557438524 and -6.557438524.

Subproblem 1

a + 1 = 6.557438524 Simplifying a + 1 = 6.557438524 Reorder the terms: 1 + a = 6.557438524 Solving 1 + a = 6.557438524 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + a = 6.557438524 + -1 Combine like terms: 1 + -1 = 0 0 + a = 6.557438524 + -1 a = 6.557438524 + -1 Combine like terms: 6.557438524 + -1 = 5.557438524 a = 5.557438524 Simplifying a = 5.557438524

Subproblem 2

a + 1 = -6.557438524 Simplifying a + 1 = -6.557438524 Reorder the terms: 1 + a = -6.557438524 Solving 1 + a = -6.557438524 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + a = -6.557438524 + -1 Combine like terms: 1 + -1 = 0 0 + a = -6.557438524 + -1 a = -6.557438524 + -1 Combine like terms: -6.557438524 + -1 = -7.557438524 a = -7.557438524 Simplifying a = -7.557438524

Solution

The solution to the problem is based on the solutions from the subproblems. a = {5.557438524, -7.557438524}

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