48=28a-a^2

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Solution for 48=28a-a^2 equation:


Simplifying
48 = 28a + -1a2

Solving
48 = 28a + -1a2

Solving for variable 'a'.

Reorder the terms:
48 + -28a + a2 = 28a + -28a + -1a2 + a2

Combine like terms: 28a + -28a = 0
48 + -28a + a2 = 0 + -1a2 + a2
48 + -28a + a2 = -1a2 + a2

Combine like terms: -1a2 + a2 = 0
48 + -28a + a2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-48' to each side of the equation.
48 + -28a + -48 + a2 = 0 + -48

Reorder the terms:
48 + -48 + -28a + a2 = 0 + -48

Combine like terms: 48 + -48 = 0
0 + -28a + a2 = 0 + -48
-28a + a2 = 0 + -48

Combine like terms: 0 + -48 = -48
-28a + a2 = -48

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 = -48 + 196

Reorder the terms:
196 + -28a + a2 = -48 + 196

Combine like terms: -48 + 196 = 148
196 + -28a + a2 = 148

Factor a perfect square on the left side:
(a + -14)(a + -14) = 148

Calculate the square root of the right side: 12.165525061

Break this problem into two subproblems by setting 
(a + -14) equal to 12.165525061 and -12.165525061.

Subproblem 1

a + -14 = 12.165525061 Simplifying a + -14 = 12.165525061 Reorder the terms: -14 + a = 12.165525061 Solving -14 + a = 12.165525061 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 = 12.165525061 + 14 Combine like terms: -14 + 14 = 0 0 + a = 12.165525061 + 14 a = 12.165525061 + 14 Combine like terms: 12.165525061 + 14 = 26.165525061 a = 26.165525061 Simplifying a = 26.165525061

Subproblem 2

a + -14 = -12.165525061 Simplifying a + -14 = -12.165525061 Reorder the terms: -14 + a = -12.165525061 Solving -14 + a = -12.165525061 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 = -12.165525061 + 14 Combine like terms: -14 + 14 = 0 0 + a = -12.165525061 + 14 a = -12.165525061 + 14 Combine like terms: -12.165525061 + 14 = 1.834474939 a = 1.834474939 Simplifying a = 1.834474939

Solution

The solution to the problem is based on the solutions from the subproblems. a = {26.165525061, 1.834474939}

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