Question

Determine which polynomial is a difference of two squares.

a2 + 36

a2 − 36

a2 − 12

a2 + 12

Answer 1

Hint: a "difference" is the result of a subtraction problem

Ex: 12 - 5 is a difference while 12+5 is a sum.

Answer 2

b, just see 36 is square of 6 and a^2 is square of a

Answer 3

b

Answer 4

A square is a number y such that

y = x^2

for some integer x

Answer 5

and take their difference

Answer 6

a^2-36=(a-6)(a+6)