Question

Tính

5⁹.7³+5⁹.7³.2³

Answer 1

\(5^9.7^3+5^9.7^3.2^3\)

\(=\left(5^3\right)^3.7^3+\left(5^3\right)^3.7^3.2^3\)

\(=125^3.7^3+125^3.7^3.2^3\)

\(=\left(125.7\right)^3+\left(125.7.2\right)^3\)

\(=875^3+1750^3\)

Answer 2

\(5^9.7^3+5^9.7^3.2^3\)

\(=\left(5^3\right)^3.7^3+\left(5^3\right)^3.7^3.2^3\)

\(=125^3.7^3+125^3.7^3.2^3\)

\(=\left(125.7\right)^3+\left(125.7.2\right)^3\)

\(=875^3+1750^3\)