Question

Which binomial could be written as a difference of squares?

9c2 + 25d2



9x2 − 8y2



36a3 − 25b2



16w2 − z2

Answer 1

16w^2 − z^2

Explanation:

The difference of squares:

16w^2 − z^2 = (4w)^2 - z^2

= (4w + z)(4w - z)