Question

Tính = cách nhanh nhất

\(\frac{6^3+3\times6^2+3^3}{-13}\)

Answer 1

= (2.3)^3+ 3. ( 2.3)^2 + 3^3 / -13

= 2^3 .3^3 + 3. 3^2 . 2^2 + 3^3 / -13

= 3^3. ( 2^3 + 2^2 + 1) /-13

= 27.13/-13

= -27

Answer 2

\(\frac{6^3+3\cdot6^2+3^3}{-13}=\frac{6^2\left(6+3\right)+3^2\cdot3}{-13}=\frac{36\cdot9+9\cdot3}{-13}=\frac{39\cdot9}{-13}=-3\cdot9=-27\)