1. Tính
a.(x-3y).(x-3y)
b.49x^2-70x+25
2.Tìm x
1.(x+2)^2+(x-3)^2-2(x-1).(x+1)=9<...
Mathematics, 04.08.2021 09:30 mathisawsome123
1. Tính
a.(x-3y).(x-3y)
b.49x^2-70x+25
2.Tìm x
1.(x+2)^2+(x-3)^2-2(x-1).(x+1)=9
2.(x+3).(x^2-3x+9)-x^3=2x
3.(x-2)^3-x^3+6x^2=7
*lưu ý: ^2=mũ 2,^3=mũ 3
Answers: 1
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