Hasil pengurangan: (p²- pq- q²) dari(-3p+pq+q²)

[tex] {p}^{2} - pq - {q}^{2} - ( - 3p + pq + {q}^{2} ) \\ = {p}^{2} - {q}^{2} - {q}^{2} + 3p - pq - pq \\ = {p}^{2} - 2 {q}^{2} - 2pq + 3p[/tex]

(-3p + pq - q² ) - (p² - pq -q²) =
= -3p + pq - q² - p² + pq + q² 
= -p² -3p + pq + pq - q² + q²
= -p² - 3p + 2pq