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@Сяй
July 2022
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Упростите выражение
a)(5m-13n)+(11n+23m)
б)-(2a+8c)+(7a-11a)
в)-3b(7-b)-4b(3b+8)
г)7x(2x-7y)-(y-9x)(3x+5y)
д)(4z-3)2+(3z+4)2
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Answers & Comments
Машенька0102
А)= 5m-13n+11n+23m = 28m-2n
б)= -2a-8c+7a-11a=-6a-8c
в)= -21b+3b^2-12b^2-32b = -9b^2-33b
г)= 14x^2-49xy-(3xy+5y^2-27x^2-45xy)=14x^2-49xy-3xy+5y^2+27x^2+45xy= 41x^2+5y^2-7xy
д)= 8z-6+6z+8= 14z+2
4 votes
Thanks 9
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Answers & Comments
б)= -2a-8c+7a-11a=-6a-8c
в)= -21b+3b^2-12b^2-32b = -9b^2-33b
г)= 14x^2-49xy-(3xy+5y^2-27x^2-45xy)=14x^2-49xy-3xy+5y^2+27x^2+45xy= 41x^2+5y^2-7xy
д)= 8z-6+6z+8= 14z+2