Question

Helppp pleaseeeeee!!!! ​

Answer 1

`{ \tt{pq( {r}^(2) + 1) - r( {p}^(2) + {q}^(2) ) }} \\ \\ \dashrightarrow \: { \tt{pq \{ {(r + 1)}^(2) - 2r \} - r \{ {(p + q)}^(2) - 2pq \} }} \\ \\ \dashrightarrow \:{ \tt{pq {(r + 1)}^(2) - 2pqr - r {(p + q)}^(2) + 2pqr}} \\ \\ \dashrightarrow \: { \tt{pq {(r + 1)}^(2) - r {(p + q)}^(2) }}`