Ответ:
1) (2+3x)²=4+12x+9x²
2) (a-5b)²=a²-10ab+25b²
3) (y+10)(y-10)=y²-100
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Ответ:
1) (2+3x)²=4+12x+9x²
2) (a-5b)²=a²-10ab+25b²
3) (y+10)(y-10)=y²-100