Ответ:
Объяснение:
1) (p+8)²=p²+16p+64 3)(x-9)(x+9=x²-81
2) (10x-3y)²=100x²-60xy+9y² 4)(4m+7n)(7n-4m)=49n²-16m²
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Ответ:
Объяснение:
1) (p+8)²=p²+16p+64 3)(x-9)(x+9=x²-81
2) (10x-3y)²=100x²-60xy+9y² 4)(4m+7n)(7n-4m)=49n²-16m²