1) 5cx-5с^2+x^2-cx = 5c(x-c) + x(x-c) = (5c+x)(x-c) = (5*1 - 2)(-2-1) = (5-2)(-3)=3*(-3)=-92) а)2a-4=2(a-2)б) 5m^2b-10mb=5mb(m-2) в) 6x(x-y)+y(x-y)=(6x+y)(x-y)3) 2y^2+8y=02y(y+4)=02y=0 ; y+4=0y=0 ; y=-4ответ: 0;-4
1) 5cx-5с^2+x^2-cx = 5c(x-c) + x(x-c) = (5c+x)(x-c) = (5*1 - 2)(-2-1) = (5-2)(-3)=3*(-3)=-9
2) а)2a-4=2(a-2)
б) 5m^2b-10mb=5mb(m-2)
в) 6x(x-y)+y(x-y)=(6x+y)(x-y)
3) 2y^2+8y=0
2y(y+4)=0
2y=0 ; y+4=0
y=0 ; y=-4
ответ: 0;-4