Question

factorise a² - 4(x-y)²​

Answer 1

Answer:

a^2 - 4^x2 + 8xy - 4^y2​

Step-by-step explanation:

(x-y)^2   =    x^2-2xy+y^2

a^2 - 4x^2 ( x^2-2xy+y^2 )

=  a^2 - 4^x2 + 8xy - 4^y2​