Question

( -1 + 1/5)² : (0,4 - 1/5)² -0,7 x 5 x √36/49

calcule:

Answer 1

(-1+1/5)^2:(0,4-1/5)^2-0,7x5xV36/49=
(-5/5+1/5)^2:(4/10-1/5)^2-7/10x5x6/7=
(-4/5)^2:(2/5-1/5)^2-35/10x6/7=
16/25:(1/5)^2-7/2x6/7=
16/25:1/25-42/14=
16/25.25/1-3=
16-3=
13