a^2-28a+35=0

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Solution for a^2-28a+35=0 equation:


Simplifying
a2 + -28a + 35 = 0

Reorder the terms:
35 + -28a + a2 = 0

Solving
35 + -28a + a2 = 0

Solving for variable 'a'.

Begin completing the square.

Move the constant term to the right:

Add '-35' to each side of the equation.
35 + -28a + -35 + a2 = 0 + -35

Reorder the terms:
35 + -35 + -28a + a2 = 0 + -35

Combine like terms: 35 + -35 = 0
0 + -28a + a2 = 0 + -35
-28a + a2 = 0 + -35

Combine like terms: 0 + -35 = -35
-28a + a2 = -35

The a term is -28a.  Take half its coefficient (-14).
Square it (196) and add it to both sides.

Add '196' to each side of the equation.
-28a + 196 + a2 = -35 + 196

Reorder the terms:
196 + -28a + a2 = -35 + 196

Combine like terms: -35 + 196 = 161
196 + -28a + a2 = 161

Factor a perfect square on the left side:
(a + -14)(a + -14) = 161

Calculate the square root of the right side: 12.68857754

Break this problem into two subproblems by setting 
(a + -14) equal to 12.68857754 and -12.68857754.

Subproblem 1

a + -14 = 12.68857754 Simplifying a + -14 = 12.68857754 Reorder the terms: -14 + a = 12.68857754 Solving -14 + a = 12.68857754 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '14' to each side of the equation. -14 + 14 + a = 12.68857754 + 14 Combine like terms: -14 + 14 = 0 0 + a = 12.68857754 + 14 a = 12.68857754 + 14 Combine like terms: 12.68857754 + 14 = 26.68857754 a = 26.68857754 Simplifying a = 26.68857754

Subproblem 2

a + -14 = -12.68857754 Simplifying a + -14 = -12.68857754 Reorder the terms: -14 + a = -12.68857754 Solving -14 + a = -12.68857754 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '14' to each side of the equation. -14 + 14 + a = -12.68857754 + 14 Combine like terms: -14 + 14 = 0 0 + a = -12.68857754 + 14 a = -12.68857754 + 14 Combine like terms: -12.68857754 + 14 = 1.31142246 a = 1.31142246 Simplifying a = 1.31142246

Solution

The solution to the problem is based on the solutions from the subproblems. a = {26.68857754, 1.31142246}

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