Question

1-4(x-y)^2 factorise​

Answer 1

Answer:

$= > (1 - 2x + 2y)(1 + 2x - 2y)$

Step-by-step explanation:

$since \: a {}^{2} - b {}^{2} = (a - b)(a + b)$

$therefore \: 1 - 4(x - y) {}^{2} =( 1) {}^{2} - (2(x - y) ) {}^{2}$

$= (1-(2x - 2y)) (1+(2x - 2y))$

$= (1 - 2x + 2y)(1 + 2x - 2y)$