Which expressions are differences of squares?

Choose all answers that are correct.

Question 1 options:

a^2 + 1

h^2 – 20

t^2 – 4

x^2 – 169

Question

Which expressions are differences of squares?

Choose all answers that are correct.

Question 1 options:
	
a^2 + 1

	
h^2 – 20

	
t^2 – 4

	
x^2 – 169

fortytherapper · Answer

Because it asks for DIFFERENCES, we can automatically get rid of one answer choice

mathmale · Answer

MtH:  How would you recognize a perfect square?
1) What does a perfect square look like if only a letter (not a number) is involved/
2) What are examples of perfect squares of integers (numerals)?