Question

factorise each of the following ( 1 to 21 ) 16(x +3y)² - 25(x - 3y)². ​​

Answer 1

Answer:

$45y = 6 - \times 28 = 1$

Answer 2

Answer:

(9x-11y)(-x+19y)

Step-by-step explanation:

16(x+y)^2-25(x-3y)^2

{4(x+y)+5(x-3y)}{4(x+y)-5(x-3y)}

(4x+4y+5x-15y)(4x+4y-5x+15y)

(9x-11y)(-x+19y)