2A - (\(xy\) + 3\(x^2\) - 2y2) = \(x^2\) - 8y2 + \(xy\)
2A = \(x^2\) - 8y2 + \(xy\) + \(xy\) + 3\(x^2\) - 2y2
2A = (\(x^2\) + 3\(x^2\)) - (8y2 + 2y2) + (\(xy+xy\))
2A = 4\(x^2\) - 10y2 + 2\(xy\)
A = (4\(x^2\) - 10y2 + 2\(xy\)): 2
A = (2\(x^2\) - 5y2 + \(xy\)).2:2
A = 2\(x^2\) - 5y2 + \(xy\)