Упростить:
a)3ac*5ab
б)10x*9y*(-7a)
в)7(y+2x)-2(x-2y)
г)2c-(3c+(2c-(c+1))+3
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Упростить:
a)3ac*5ab
б)10x*9y*(-7a)
в)7(y+2x)-2(x-2y)
г)2c-(3c+(2c-(c+1))+3
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а) 3ас*5ab=15a^2bc
b)10x*9y*(-7a)=-630axy
v)7(y+2x)-2(x-2y)=7у+14x-2x+4y=11y+12x
r) 2c-(3c+(2c-(c+1))+3=2c-(3c+2c-c-1)+3=2c-3c-2c+c+1+3=-2c+4