### Home > CCA > Chapter 8 > Lesson 8.1.5 > Problem8-49

8-49.

Factor each polynomial.

1.  $x^2−64$

This is a difference of two squares.

$(x+8)(x−8)$

1.  $y^2−6y+9$

This is a perfect square trinomial.

$(y−3)^2$

1.  $4x^2+4x+1$

Look at the hint in part (b).

1.  $5x^2−45$

Start by factoring out the greatest common factor. Then look at the hint in part (a).