Question

answer soon.............34, 35 and 36

Answer 1

ist auestion is on a^2-b^2
and second one is 0
and third one is -3,7

Answer 2

34.
49x^2-b= (7x)^2-(1/2)^2
Since rhs is of the form(a+b)(a-b)=a^2-b^2
49 x^2 - b = 49 x^2 -1/4
-b = -1/4
b =1/4