Question

Calculati:
a) [(120·625)·(2la puterea3·10)]:(2·5la puterea3:25)la puterea 5
b)6+2·[(3·5 la puterea2-2la puterea2·18:3la puterea2+3·11):2la puterea2]

Efectuati folosind factor comun:
a) 2la puterea76+2la puterea78+2la puterea80=
b)3·5la puterea47+2·5la puterea48+6·5la puterea49

Answer 1

a)[(3·2³·5·5la put.4)·(2³·2·5)]:(2·5³:5²)la put.5=
=(3·2 la put.(3+3+1)·5la put(1+4+1)]:(2·5la put.(3-2))la put.5=
=(3·2la put.7·5la put.6):(2 la put.5·5la put.5)=
=3·2 la put(7-5)·5la put.(6-5)=
=3·2²·5=3·4·5=60
b) =6+[(75-4·18:9+33):4]=
=6+[(75-8+33):4]=
=6+100;4=6+25=31

a)=2 la put 76·(1+2²+2la put4)=
=2la put.76·21
b)=5la put.47(3+2·2+6·5²)=
=5la put.47·157