1. a) \(13.146-46.13+4^2.5-6\left(3^2-4\right)=13\left(146-46\right)+16.5-6.5\)
\(=13.100+5\left(16-6\right)\)
\(=13.100+5.10=135\)
b) \(35+\left[149-2\left(3^3.19-3^3.17\right)\right]=35+\left[149-2.3^3\left(19-17\right)\right]\)
\(=35+149-54.2\)
\(=76\)
2. a) \(5\left(x+15\right)=5^3\Leftrightarrow x+15=5^2\Leftrightarrow x=10\)
Vậy \(x=10\)
b) Không nhìn được
2:
a: 5(x+15)=5^3
=>x+15=5^3/5=25
=>x=10
b: 23+x-3^2=5^3-5^4
=>x+14=125-625=-500
=>x=-500-14=-514