Question

How did you get from a²-b² to (a+b)(a-b)? Solve please! Thanks

Answer 1

see formula no 5
it's a formula we can't say or guess why is it like that . just solve the problems accordingly

Answer 2

$(x - y)(x + y) = x {}^{2} - xy + yx - y { }^{2} \\ x {}^{2} - y {}^{2}$
on solving we get the formula