Question

Dau coroana la cel mai corect raspuns la exercitiu+multumesc anticipat+20 puncte. Ajutorrrr

Answer 1

a)[(-5/12 - 1/18) + (-4/9 - 1/6)]·(-36/13)=
[(-5·3-2)/36+(-4·2-3)/18]·(-36/13)=
[(-17/36) - 11/18]·(-36/13)=
(-17-22)/36·(-36/13)=
(-39/36)·(-36/13)=
3

b)[-3/4 - (-2/3 - 5/6)]·(-8/3)=
[-3/4 - (-4-5)/6]·(-8/3)=
(-3/4 + 9/6)·(-8/3)=
(-3·3+9·2)/12 · (-8/3)=
(-9+18)/12 · (-8/3)=
9/12 · (-8/3)=
(-2)

c)[(-2/5)⁷⁻³⁻²]²:[(3-5)/5]³:(2-1)/2=
[(-2/5)²]²:(-2/5)³:1/2=
(-2/5)⁴:(-2/5)³:1/2=
(-2/5)⁴⁻³·2=
(-2/5)·2=
(-4/5)