a^2+7a+7a=2

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Solution for a^2+7a+7a=2 equation:


Simplifying
a2 + 7a + 7a = 2

Reorder the terms:
7a + 7a + a2 = 2

Combine like terms: 7a + 7a = 14a
14a + a2 = 2

Solving
14a + a2 = 2

Solving for variable 'a'.

Reorder the terms:
-2 + 14a + a2 = 2 + -2

Combine like terms: 2 + -2 = 0
-2 + 14a + a2 = 0

Begin completing the square.

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + 14a + 2 + a2 = 0 + 2

Reorder the terms:
-2 + 2 + 14a + a2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + 14a + a2 = 0 + 2
14a + a2 = 0 + 2

Combine like terms: 0 + 2 = 2
14a + a2 = 2

The a term is 14a.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14a + 49 + a2 = 2 + 49

Reorder the terms:
49 + 14a + a2 = 2 + 49

Combine like terms: 2 + 49 = 51
49 + 14a + a2 = 51

Factor a perfect square on the left side:
(a + 7)(a + 7) = 51

Calculate the square root of the right side: 7.141428429

Break this problem into two subproblems by setting 
(a + 7) equal to 7.141428429 and -7.141428429.

Subproblem 1

a + 7 = 7.141428429 Simplifying a + 7 = 7.141428429 Reorder the terms: 7 + a = 7.141428429 Solving 7 + a = 7.141428429 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + a = 7.141428429 + -7 Combine like terms: 7 + -7 = 0 0 + a = 7.141428429 + -7 a = 7.141428429 + -7 Combine like terms: 7.141428429 + -7 = 0.141428429 a = 0.141428429 Simplifying a = 0.141428429

Subproblem 2

a + 7 = -7.141428429 Simplifying a + 7 = -7.141428429 Reorder the terms: 7 + a = -7.141428429 Solving 7 + a = -7.141428429 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + a = -7.141428429 + -7 Combine like terms: 7 + -7 = 0 0 + a = -7.141428429 + -7 a = -7.141428429 + -7 Combine like terms: -7.141428429 + -7 = -14.141428429 a = -14.141428429 Simplifying a = -14.141428429

Solution

The solution to the problem is based on the solutions from the subproblems. a = {0.141428429, -14.141428429}

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