=4х(3+х)
=(10а-5в)-(2ах-вх)=5(2а-в)-х(2а-в)=(2а-в)(5-х)
3(4-х)²-4(х-4)=3(х-4)²-4(х-4)=(х-4)(3(х-4)-4)=(х-4)(3х-12-4)=(х-4)(3х-16)
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=4х(3+х)
=(10а-5в)-(2ах-вх)=5(2а-в)-х(2а-в)=(2а-в)(5-х)
3(4-х)²-4(х-4)=3(х-4)²-4(х-4)=(х-4)(3(х-4)-4)=(х-4)(3х-12-4)=(х-4)(3х-16)