Question

Jawab yahhh please pr kumon nihh! bacanya dari kiri #kamerany lola

Answer 1

(4) (x + y)² - 4
=> (x + y)(x + y) - 4
=> x² + 2xy + y² - 4

(5) (x + y)² - z²
=> (x + y)(x + y) - z²
=> x² + 2xy + y² - z².

Semangat kerjain kumonnya dek