1.(p+3)(p²-2p+1) 2.(p-4)(p²+4p+16) 3.(p²-4)(2p²+3pq-5q²) 4.(x²+y²)(x²-y²) jawab y please...

1.) (p+3)(p²-2p+1)
= p³ - 2p² + p + 3p² - 6p + 3
= p³ + p² - 5p + 3

2.) (p-4)(p²+4p+16)
= p³ - 4³
= p³ - 64

3.) (p²-4)(2p²+3pq-5q²)
= p² × 2pq² + p² × 3pq - p² × 5q² - 4 × 2p² - 4 × 3pq - 4 (-5q²)
= 2p4 + 3p³q - 5p²q² - 8p² - 12pq + 20q²

4.) (x² + y²) (x²-y²)
= (x²)² - (y²)²
= x pangkat 4 - y pangkat 4