5a-3=a^2

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Solution for 5a-3=a^2 equation:


Simplifying
5a + -3 = a2

Reorder the terms:
-3 + 5a = a2

Solving
-3 + 5a = a2

Solving for variable 'a'.

Combine like terms: a2 + -1a2 = 0
-3 + 5a + -1a2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
3 + -5a + a2 = 0

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + -5a + -3 + a2 = 0 + -3

Reorder the terms:
3 + -3 + -5a + a2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -5a + a2 = 0 + -3
-5a + a2 = 0 + -3

Combine like terms: 0 + -3 = -3
-5a + a2 = -3

The a term is -5a.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5a + 6.25 + a2 = -3 + 6.25

Reorder the terms:
6.25 + -5a + a2 = -3 + 6.25

Combine like terms: -3 + 6.25 = 3.25
6.25 + -5a + a2 = 3.25

Factor a perfect square on the left side:
(a + -2.5)(a + -2.5) = 3.25

Calculate the square root of the right side: 1.802775638

Break this problem into two subproblems by setting 
(a + -2.5) equal to 1.802775638 and -1.802775638.

Subproblem 1

a + -2.5 = 1.802775638 Simplifying a + -2.5 = 1.802775638 Reorder the terms: -2.5 + a = 1.802775638 Solving -2.5 + a = 1.802775638 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + a = 1.802775638 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + a = 1.802775638 + 2.5 a = 1.802775638 + 2.5 Combine like terms: 1.802775638 + 2.5 = 4.302775638 a = 4.302775638 Simplifying a = 4.302775638

Subproblem 2

a + -2.5 = -1.802775638 Simplifying a + -2.5 = -1.802775638 Reorder the terms: -2.5 + a = -1.802775638 Solving -2.5 + a = -1.802775638 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + a = -1.802775638 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + a = -1.802775638 + 2.5 a = -1.802775638 + 2.5 Combine like terms: -1.802775638 + 2.5 = 0.697224362 a = 0.697224362 Simplifying a = 0.697224362

Solution

The solution to the problem is based on the solutions from the subproblems. a = {4.302775638, 0.697224362}

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