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b) 2(a²b + 2ab)
c) abc( 1 -2a + c)
d) z(z² +2z + 3)
e)2ab(a + 2b-3)
b)2a²b + 4ab =2a(ab+2b)
c)ab²c - 2a²bc + abc² =abc(b-2a+c)
d)z³ + 2z² - 3z =z(z²+2z-3)
e) 2a²b + 4ab² - 6ab =2ab(a+2b-3)
x(6xy-y)-y(2x²-xy + x) -2 =-1(6*(-1)*0,2-0,2)-0,2(2*1+0,2-1)-2=
-1(-1,2-0,2)-0,2(2-0,8)-2=1,4-0,2*1,2-2=1,4-0,24-2=0,16-2=1,84