Question
what is c squared minus 6cd plus 9d squared minus 4
Answers
Reiny
write it this way:
c^2 - 6cd + 9d^2 - 4
= (c - 3d)^2 - 4
now I see a difference of squares
= (c-3d + 2)(c-3d-2)
c^2 - 6cd + 9d^2 - 4
= (c - 3d)^2 - 4
now I see a difference of squares
= (c-3d + 2)(c-3d-2)