Question

(9+1)^(х+11)(х+9)=(9+1)^20(9+9)??????? Очень срочно

Answer 1

100•(х^+9х+11х+99)=100•360
100•(х^+20х+99)=36000 |:100
х^+20х+99=360
х^+20х-261=0
х1=-29
х2=9