Question

Решить рациональным способом -
45*52-52*42+42*51-51*39+39*50-50*36+36*49-49*33=

Answer 1

(45-42)*52+(42-39)*51+(39-36)*50+(36-33)*49=3*52+3*51+3*50+3*49=(52+51+50+49)*33=(51+49+50+52)*3=202*3=606  ...