please jawab donkk no 1,2,3 ..pentingg !!!

ya tinggal di kali kali in

1)
(x+3)²
= (x+3) (x+3)
= x² + 3x + 3x + 9
= x² + 6x + 9

2)
(x+8)²
= (x+8)(x+8)
= x² + 8x + 8x + 64
= x² + 16x + 64

3) (x-7)³
= (x-7)(x-7)(x-7)
= x² - 7x - 7x + 49 (x-7)
= x² - 14x + 49 (x-7)
= x³ - 7x² - 14x² + 98x + 49x - 343
= x³ - 21x² + 147x - 343