129 -5[29-(6-1) ^2]
=129 - 5[29- 5^2]
= 129 -5[ 29-25]
=129 - 5 × 4
=129 - 20
=109
Ta có: \(129-5\left[29-\left(6-1\right)^2\right]\)
\(=129-5\left[29-5^2\right]\)
\(=129-5\cdot4\)
=109
129 - 5 [ 29 - \(\left(6-1\right)^2\) ]
= 129 - 5 [ 29 - \(5^2\) ]
= 129 - 5 [ 29 - 25 ]
= 129 - 5 . 4
= 129 - 20
= 109
Chúc bạn học tốt nhé !
KO ghi đề nhé
\(=129-5\left(29-5^2\right)\)
\(=129-5\left(29-25\right)\)
\(=129-5.4\)
\(=129-20\)
\(=109\)
\(129-5.\left[29-\left(6-1\right)^2\right]\)
\(=129-5.\left[29-\left(5\right)^2\right]\)
\(=129-5.\left[29-25\right]\)
\(=129-5.4\)
\(=129-20\)
\(=109\)
