jawablah bentuk aljabar berikut 1). 1/3 (21y - 6x) 2). (x - 2) (2x - 7)

1. 1/3 (21y - 6x)
= 21y/3 - 6x/3
= 7y - 2x
= -2x + 7y

2. (x - 2) (2x - 7)
= x(2x) + x(-7) - 2(2x) - 2(-7)
= 2x² -7x - 4x + 14
= 2x² - 11x + 14