Question

4pq-5p²+49²from 5p²+39²-pq​

Answer 1

Answer:

$10 {p }^{2} - 10 {}^{2} - 5pq$

Step-by-step explanation:

$5p {}^{2} + 39 {}^{2} - pq - (4pq - 5p { }^{2} + 49 {}^{2} ) \\ 5p {}^{2} + 39 { }^{2} - pq \: - 4pq + 5p {}^{2} - 49 { }^{2} \\ 5p { }^{2} + 5p {}^{2} + 39 {}^{2} - 49 {}^{2} - pq - 4pq \\ 10p {}^{2} - 10 {}^{2} - 5pq$