Question

scrieti sub forma unei puteri : (2la8×3la7):(2la5×3la4) ; (13la13×13la7):(13la10×134; (9la3×6la4):(9la2×6la5)totul la4 ; 2la1997-2la1996; 2la1997×3la1998-2la1998×3la1997 VA ROGG

Answer 1

2la8x3la7):(2la5x3la4)=2la3x3la3=(2x3)la3=6la3

(13la13x13la7):(13la1ox13la4)=13la20:13la14=13la6

(9la3x6la4):(9la2x6la5)la4=9la3x6la4:(9la8x6la20)    (asta cred ca nu l-ai scris ok sau nu am inteles eu......

2la1997-2la1996=
2la1996(2-1)=2la1996

2la1997x3la1998-2la1998x3la1997=
se da factor comun 2la1997x3la1997
2la1997x3la1997(1x3la1-2la1x1)=
(2x3)la1997x(3-2)=6la1997