Question

A= l . w
x is 3 and y is 7
(xy+1) (xy-1) ​

Answer 1

462

Explanation:

1. Start by substituting the value of x and and

2. You then multiply the substituted value in each brace and add 1 and subtract 1 from each bracket respectively

3. After getting your final answer in each bracket multiply them

4. You then get your final answer as 462