Is the polynomial a difference of squares and if it is, factor the polynomial
y^2 - 9

(x + 3)(x - 3).

Step-by-step explanation:

Yes,  because both y^2 and 9 are perfect squares.

y^2 - 9

= (x + 3)(x - 3).

whatvare the choices

step-by-step explanation:

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)