Question

Factorise: 25 – 4x^2 - 12xy – 9y^2​

Answer 1

Step-by-step explanation:

$25 - (( {2x)}^{2} + (2)(2x)( 3y) + ( {3y)}^{2}) \\ 25 - {(2x + 3y)}^{2} \\ {(5)}^{2} - {(2x + 3y)}^{2} \\ (2x + 3y + 5)(5 - 2x - 3y)$

Answer 2

Answer:

25 - 4x² - 12xy - 9y²

25 - (4x² + 12xy + 9y²)

(5)² - (2x + 3y)²

(5 - 2x - 3y) (5 + 2x + 3y)