Question

factor the expression. 49b^2 – 36

a. (7b – 6)(7b – 6)

b. (7b 6)(7b 6)

c. (6b 7)(6b – 7)

d. (7b 6)(7b – 6)

Answer 1

49b^2 -36 = (7b -6)(7b +6)

so because there you missed some signs in these wrote choices 

hope helped