If you would like to solve 3 (x - 2) ^2 - 2 (x - 1), you can calculate this using the following steps:
3 (x - 2) ^2 - 2 (x - 1) = 3 (x^2 - 2 2 x + 2^2) - 2 x + 2 1 = 3 x^2 - 3 4 x + 3 4 - 2 x + 2 = 3 x^2 - 12 x + 12 - 2 x + 2 = 3 x^2 - 14 x + 14
The correct result would beĀ 3 x^2 - 14 * x + 14.