2. Упростите выражение: a² +16 a-4 1) 3) 5) + a 2a-yb x2 + 25 y2 x-5y 8a 4-a + + ; 10 ху 5у-х 3a-by by-2a 2) 4) x2 + 4y² x-2y + 9a2 + 4у2 3а-2у 4 xy 2у-х + x2 a²x² + 25 y² ax-5у b-2a' 12ay 2y-3а + 10 аху бу-ах​
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