A^2=3A-18

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Solution for A^2=3A-18 equation:


Simplifying
A2 = 3A + -18

Reorder the terms:
A2 = -18 + 3A

Solving
A2 = -18 + 3A

Solving for variable 'A'.

Reorder the terms:
18 + -3A + A2 = -18 + 3A + 18 + -3A

Reorder the terms:
18 + -3A + A2 = -18 + 18 + 3A + -3A

Combine like terms: -18 + 18 = 0
18 + -3A + A2 = 0 + 3A + -3A
18 + -3A + A2 = 3A + -3A

Combine like terms: 3A + -3A = 0
18 + -3A + A2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-18' to each side of the equation.
18 + -3A + -18 + A2 = 0 + -18

Reorder the terms:
18 + -18 + -3A + A2 = 0 + -18

Combine like terms: 18 + -18 = 0
0 + -3A + A2 = 0 + -18
-3A + A2 = 0 + -18

Combine like terms: 0 + -18 = -18
-3A + A2 = -18

The A term is -3A.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3A + 2.25 + A2 = -18 + 2.25

Reorder the terms:
2.25 + -3A + A2 = -18 + 2.25

Combine like terms: -18 + 2.25 = -15.75
2.25 + -3A + A2 = -15.75

Factor a perfect square on the left side:
(A + -1.5)(A + -1.5) = -15.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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