계산: 5x - 2 [3x - 2 (3x + 1)]

계산: 5x - 2 [3x - 2 (3x + 1)]

5x - 2 [3x - 2 (3x + 1)]
= 5x - 2 [3x - 6x - 2]
= 5 x + 6 x + 4
= 11x + 4