a(a-2)=3(a-5)

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Solution for a(a-2)=3(a-5) equation:


Simplifying
a(a + -2) = 3(a + -5)

Reorder the terms:
a(-2 + a) = 3(a + -5)
(-2 * a + a * a) = 3(a + -5)
(-2a + a2) = 3(a + -5)

Reorder the terms:
-2a + a2 = 3(-5 + a)
-2a + a2 = (-5 * 3 + a * 3)
-2a + a2 = (-15 + 3a)

Solving
-2a + a2 = -15 + 3a

Solving for variable 'a'.

Reorder the terms:
15 + -2a + -3a + a2 = -15 + 3a + 15 + -3a

Combine like terms: -2a + -3a = -5a
15 + -5a + a2 = -15 + 3a + 15 + -3a

Reorder the terms:
15 + -5a + a2 = -15 + 15 + 3a + -3a

Combine like terms: -15 + 15 = 0
15 + -5a + a2 = 0 + 3a + -3a
15 + -5a + a2 = 3a + -3a

Combine like terms: 3a + -3a = 0
15 + -5a + a2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-15' to each side of the equation.
15 + -5a + -15 + a2 = 0 + -15

Reorder the terms:
15 + -15 + -5a + a2 = 0 + -15

Combine like terms: 15 + -15 = 0
0 + -5a + a2 = 0 + -15
-5a + a2 = 0 + -15

Combine like terms: 0 + -15 = -15
-5a + a2 = -15

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 = -15 + 6.25

Reorder the terms:
6.25 + -5a + a2 = -15 + 6.25

Combine like terms: -15 + 6.25 = -8.75
6.25 + -5a + a2 = -8.75

Factor a perfect square on the left side:
(a + -2.5)(a + -2.5) = -8.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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