a^2-14a-49=

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Solution for a^2-14a-49= equation:


Simplifying
a2 + -14a + -49 = 0

Reorder the terms:
-49 + -14a + a2 = 0

Solving
-49 + -14a + a2 = 0

Solving for variable 'a'.

Begin completing the square.

Move the constant term to the right:

Add '49' to each side of the equation.
-49 + -14a + 49 + a2 = 0 + 49

Reorder the terms:
-49 + 49 + -14a + a2 = 0 + 49

Combine like terms: -49 + 49 = 0
0 + -14a + a2 = 0 + 49
-14a + a2 = 0 + 49

Combine like terms: 0 + 49 = 49
-14a + a2 = 49

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 = 49 + 49

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

Combine like terms: 49 + 49 = 98
49 + -14a + a2 = 98

Factor a perfect square on the left side:
(a + -7)(a + -7) = 98

Calculate the square root of the right side: 9.899494937

Break this problem into two subproblems by setting 
(a + -7) equal to 9.899494937 and -9.899494937.

Subproblem 1

a + -7 = 9.899494937 Simplifying a + -7 = 9.899494937 Reorder the terms: -7 + a = 9.899494937 Solving -7 + a = 9.899494937 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 = 9.899494937 + 7 Combine like terms: -7 + 7 = 0 0 + a = 9.899494937 + 7 a = 9.899494937 + 7 Combine like terms: 9.899494937 + 7 = 16.899494937 a = 16.899494937 Simplifying a = 16.899494937

Subproblem 2

a + -7 = -9.899494937 Simplifying a + -7 = -9.899494937 Reorder the terms: -7 + a = -9.899494937 Solving -7 + a = -9.899494937 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 = -9.899494937 + 7 Combine like terms: -7 + 7 = 0 0 + a = -9.899494937 + 7 a = -9.899494937 + 7 Combine like terms: -9.899494937 + 7 = -2.899494937 a = -2.899494937 Simplifying a = -2.899494937

Solution

The solution to the problem is based on the solutions from the subproblems. a = {16.899494937, -2.899494937}

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