а) 18xz(x-2r)-10ry(x-2r)= (x-2r)*(18xz-10ry)= 2*(x-2r)*(9xz-5ry)
б) (ab-c)-ab(ab-c)+a²b²(ab-c)= (ab-c)*(1-ab+a²b²)
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а) 18xz(x-2r)-10ry(x-2r)= (x-2r)*(18xz-10ry)= 2*(x-2r)*(9xz-5ry)
б) (ab-c)-ab(ab-c)+a²b²(ab-c)= (ab-c)*(1-ab+a²b²)