Question

Which expressions are differences of squares?

Select each correct answer.
A: t^2−1
B: k^2+81
C: n^2−225
D: p^2−40

Answer 1

a²-b² is difference


A. t²-1², yep
B. nope, not difference
C. n²-15²,yep
D. we can force it but I wouldn''t pick this one


A and C