Selesaikan bentuk eksponen berikut (x+y)²-(x-y)² =

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