28 tháng 6 2021 lúc 13:00
Bài 8 :
\(\left(1+x\right)^3=1+3x+3x^2+x^3\)
\(\left(1+5y\right)^2=1+15y+75y^2+125y^3\)
\(\left(\dfrac{2}{3}m+1\right)^3=\dfrac{8}{27}m^3+\dfrac{4}{3}m^2+2m+1\)
\(\left(3+2x\right)^3=27+54x+36x^2+8x^3\)
\(\left(5a+3b\right)^2=125a^3+225a^2+135b^2+27b^3\)
\(\left(2+\dfrac{3}{4}m^3\right)^3=8+9m^3+\dfrac{27}{8}m^6+\dfrac{27}{64}m^9\)
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