Which of the following is/are true?
A.x-y+z/y-x-z=1
B.3a-b<1/3a+b=>9a^2-b^2<1
C.p^2-pq+q^2=(p-q)^2
I think they are all false,because for A if i had to substitute with numbers i wont get 1 and for B im a little confused but i cross multiplied as for C (p-q)^2 its product is p^2-2pq-q^2...please help
You are correct on all three.
A and B could be true with various numbers, but C is only true if p or q is zero.