Question

daca y+z=8 si x=11, atunci x x z + y x x=............ .

Answer 1

(1) y+z=8=>y=8-z
(2) x=11,
Din (1 si (2)=>x x z + y x x=11*11*z+(8-z)*11*11=>
=>x x z + y x x=11*11(z+8-z)=>
=>x x z + y x x=11*11(z-z+8)=>
=>x x z + y x x=11*11(0+8)=>
=>x x z + y x x=11*11*8=>
=>x x z + y x x=121*8=>
=>x x z + y x x=968