Question

(-9) mũ 2 ×(-64)-4×81×9

Answer 1

(-9)² x (-64) - 4 x 81 x 9=

=81 x (-64) - 4 x 81 x 9

=(-5184) - 324 x9

=(-5184) - 2916

=(-8100)

Answer 2

(-9)² x (-64) - 4 x 81 x 9

= 81 x (-64) - 4 x 81 x 9

= 81 x [ (-64)- 4x9 ]

= 81 x (-100)

= -8100

Answer 3

\(\left(-9\right)^2\cdot\left(-64\right)-4\cdot81\cdot9\)

\(=-\left(81\cdot64-81\cdot4\cdot9\right)\)

\(=-81\cdot4\cdot\left(1\cdot16-9\right)\)

\(=-324\cdot7\)

\(=-2268\)