Question

tính nhanh: 99³+1+3(99²+99)

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Answer 1

 = (99+1).(99^2-99+1)+3.99.(99+1)

 = 100.(99^2-99+1)+3.99.100

 = 100.(99^2-99+1+3.99)

 = 100.(99^2+2.99+1)

 = 100.(99+1)^2 = 100.100^2 = 100.10000 = 1000000

k mk nha

Answer 2

99³+1+3(99²+99)=1000000

Answer 3

\(99^3+1+3\left(99^2+99\right)\)

\(=99^3+3.99^2.1+3.99.1^2+1^3\)

\(=\left(99+1\right)^3\)

\(=100^3\)

\(=1000000\)