a^2-14a+2=8

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Solution for a^2-14a+2=8 equation:


Simplifying
a2 + -14a + 2 = 8

Reorder the terms:
2 + -14a + a2 = 8

Solving
2 + -14a + a2 = 8

Solving for variable 'a'.

Reorder the terms:
2 + -8 + -14a + a2 = 8 + -8

Combine like terms: 2 + -8 = -6
-6 + -14a + a2 = 8 + -8

Combine like terms: 8 + -8 = 0
-6 + -14a + a2 = 0

Begin completing the square.

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + -14a + 6 + a2 = 0 + 6

Reorder the terms:
-6 + 6 + -14a + a2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -14a + a2 = 0 + 6
-14a + a2 = 0 + 6

Combine like terms: 0 + 6 = 6
-14a + a2 = 6

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 = 6 + 49

Reorder the terms:
49 + -14a + a2 = 6 + 49

Combine like terms: 6 + 49 = 55
49 + -14a + a2 = 55

Factor a perfect square on the left side:
(a + -7)(a + -7) = 55

Calculate the square root of the right side: 7.416198487

Break this problem into two subproblems by setting 
(a + -7) equal to 7.416198487 and -7.416198487.

Subproblem 1

a + -7 = 7.416198487 Simplifying a + -7 = 7.416198487 Reorder the terms: -7 + a = 7.416198487 Solving -7 + a = 7.416198487 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 = 7.416198487 + 7 Combine like terms: -7 + 7 = 0 0 + a = 7.416198487 + 7 a = 7.416198487 + 7 Combine like terms: 7.416198487 + 7 = 14.416198487 a = 14.416198487 Simplifying a = 14.416198487

Subproblem 2

a + -7 = -7.416198487 Simplifying a + -7 = -7.416198487 Reorder the terms: -7 + a = -7.416198487 Solving -7 + a = -7.416198487 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 = -7.416198487 + 7 Combine like terms: -7 + 7 = 0 0 + a = -7.416198487 + 7 a = -7.416198487 + 7 Combine like terms: -7.416198487 + 7 = -0.416198487 a = -0.416198487 Simplifying a = -0.416198487

Solution

The solution to the problem is based on the solutions from the subproblems. a = {14.416198487, -0.416198487}

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