Assalamualaikum.. Mohon bantuannya ya trman teman

1. (x+3)³
= (x+3)(x+3)(x+3)
= x² +3x + 3x + 9(x+3)
= x² + 6x + 9 (x+3)
= x³ + 3x² + 6x² + 18x + 9x + 27
= x³ + 9x² + 27x + 27

2. (x-5)⁴
= (x-5)(x-5)(x-5)(x-5)
= x² -10x - 25 (x-5)(x-5)
= x³ -5x² -10x² +50x -25x +125(x-5)
= x³ -15x² +25x + 125 (x-5)
= x⁴ -5x³ -15x³ +75x² +75x² -375x +125x -625
= x⁴ -10x³ +150x² -250x - 625

Huuh pusing:v
Semoga membantu:)

3. (x+1)^7
x^7 +7x +7