Question

p^2-2pq+q^2-r^2+2r-1

Factor it please

Answer 1

@campbell_st

Answer 2

This formula may be useful

(a + b) ^2 = a^2 + 2ab + b^2

Answer 3

can you substitute it in for me so its more clear

Answer 4

\[p ^{2}-2pq+q ^{2}-r ^{2}+2r-1\]
\[(p - q)(p -q)-(r -1 )(r - 1)\]