Question

Factorise it

(x + 2y)² – (x – 2y)²
​

Answer 1

⇒ (x + 2y)² - (x - 2y)²

⇒ x² + 4y² + 4xy - (x² + 4y² - 4xy)

⇒ x² + 4y² - x² - 4y² + 4xy + 4xy

⇒ 8xy

⍟ which is the required answer

Answer 2

$= > (x + 2y) {}^{2} - (x - 2y) {}^{2} = > x + 2y {}^{2} - x + 2y {}^{2} = > x - x + 2y {}^{2} + 2y { }^{2} = > 2y {}^{2} + 2y {}^{2}$

this is answer