Question

245-4.[2 mu 4 : 2 mu 3+ 2(4.3 mu 2 -9)]-5

Answer 1

`245-4[2^4:2^3+2(4.3^2-9)]-5`

`=245-4[2^[4-3]+2(36-9)]-5`

`=245-4(2+2.27)-5`

`=245-4(2+54)-5`

`=245-4.56-5`

`=245-224-5`

`=21-5`

`=16`

Answer 2

\(=245-4\left[2+2\left(4\cdot3^2-9\right)\right]-5=245-4\left[2+2\cdot27\right]-5=245-4\cdot56-5=16\)