1 câu trả lời
3x2(x2−5)+x(−3x+4x)+6x2
=3x2(x2−5)+x.x+6x2
=3x2(x2−5)+x2+6x2
=3x2(x2−5)+7x2
=x2(3x2−8)
=(−5)2[3(−5)2−8]
=25(75−8)=25.67=1675
3x2(x2−5)+x(−3x+4x)+6x2
=3x2(x2−5)+x.x+6x2
=3x2(x2−5)+x2+6x2
=3x2(x2−5)+7x2
=x2(3x2−8)
=(−5)2[3(−5)2−8]
=25(75−8)=25.67=1675