Which of the following must be true for an expression to be a difference of two squares?

a. all variables are raised to an even power
b. there are only two terms
c. both terms have negative coefficients

a. a, b, and c
b. b and c
c. a and b
d. a and c

C is the correct option.

Step-by-step explanation:

The true statements are :

a. all variables are raised to an even power

b. there are only two terms.

Here, we will take the example of:

This equation consists of two perfect squares, and . The variables are raised to even power (2) and also the equation has 2 terms.

Upon factoring we get .

Therefore, we can say that the difference of two squares means that both terms of the equation should be square numbers. This is not possible for more than 2 terms.

easy math just plug in a and b

step-by-step explanation: