Hasil pengurangan 5p2-pq-2q2 dari 8p2+pq+q2

8p²+pq+q²-(5p²-pq-2q²)
=8p²+pq+q²-5p²+pq+2q²
=8p²-5p²+pq+pq+q²+2q²
=3p²+2pq+3q²

(8p²+pq+q²) -(5p²-pq-2q²)
=8p²+pq+q²-5p²+pq+2q²
=8p²-5p²=3p²
=pq+pq=pq
=q²+2q²=2q²
3p²+pq+2q²
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