Question

Determine which polynomial is a difference of two squares.

y2 − 25

y2 + 25

y2 − 10

y2 + 10

Answer 1

A difference in squares is in the form (a^2 - b^2) = (a + b)(a - b)

Answer 2

y2 − 25

Answer 3

Difference of two squares \(a^2 - b^2\).
Difference means subtraction so two options are eliminated.
Now we have two different kind of differences. Do you think both have both terms as perfect squares?

Answer 4

it's a!**

Answer 5

The one which has both of the terms as perfect squares will be the answer.

Answer 6

\[(y+5)(y-5)\]