jabarkan bentuk dari1.(4x-y)² 2.(3p-q)²

1. (4x-y)²= (4x-y)(4x-y)
= (4x×4x)-(4x×y)-(y×4x)+(y×y)
= 16x²-4xy-4xy+y²
= 16x²-8xy+y²
2. (3p-q)²= (3p-q)(3p-q)
= (3p×3p)-(3p×q)-(q×3p)+(q×q)
= 9p²-3pq-3pq+q²
= 9p²-6pq+q²


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