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Dragon0373
@Dragon0373
July 2022
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Решите подробно 1 вариант
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Hanzou
1)2c(1+c)-(c-2)(c+4)=2c+2c²-c+2=2c²+c+2
2)(y+2)²-2y(y+2)=y²+4y+4-2y²-4y=-y²-4
3)30x+3(x-5)²=30x+3(x²-10x+25)=30x+3x²-30x+75=3x²+75
№2
1) 4a-a³=a(4-a²)
2)ax²+2ax+a=a(x²+2x)
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Dragon0373
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Answers & Comments
2)(y+2)²-2y(y+2)=y²+4y+4-2y²-4y=-y²-4
3)30x+3(x-5)²=30x+3(x²-10x+25)=30x+3x²-30x+75=3x²+75
№2
1) 4a-a³=a(4-a²)
2)ax²+2ax+a=a(x²+2x)