Question

Va rog frumos daca știți ajutați mă!!!

Answer 1

9. b) [(2x+1)-3]^2

c) [(3a+5)-a]^2

d) [(2x+3y)-(x+y)]^2

10. a. (98+2)(98-2)= 100×96=9600

b. (994+6)(994-6)=1000×988=988000

c) (100-7)(100+7)=100^2-7^2=10000-49=490000

d) 192×208= (200-8)(200+8)=200^2-8^2=40000-64=39936