Question

Expand the following :

$(4xy - 8) {}^{2}$
​

Answer 1

Answer:

16x²y² - 64xy + 64

Step-by-step explanation:

Note: we know that (a - b) ² = a² + b² - 2ab

Comparing the question with above formula

a = 4xy and b = 8

= (4xy)² + (8)² - 2(4xy)(8)

= 16x²y² - 64xy + 64