1. .......................= - 1 15/49
1) -3/4 * 12/7= - 9/7= - 1 2/7
2) (-1/7)²=(-1/7) * (-1/7)=1/49
3) - 1 2/7 - 1/49= - 1 14/49 - 1/49= - 1 15/49
2. ....................= - 10
1) (-1/3)²=( -1/3)*( -1/3)=1/9
2) 0,5 :1/9=0,5*9=4,5
3) 4,5 * (-2 2/3)= - 45/10 * 8/3= - 9/2 * 8/3= - 3*4= - 12
4) -12 * 5/6= - 10