Question

If x + y = 7/10 and x - y = 5/14 then what does x^2 -y^2 equal?

A) (7/10)^2 - (5/14) ^2
B) (1/2)^2
C) (5/14)^2
D) (7/10 - 5/14) ^2

Answer 1

what is the product of conjugates?

Answer 2

in other words:

(a+b)(a-b) = ???

Answer 3

ohhh i see
thanks

Answer 4

so b?