Question

Verificati daca urmatoarele nr naturale sunt patrate perfecte
A) 8•2+8•6;
B)5•6+6;
C)2 ²+2²+1;
D)3²+4²-5²;
E)12•5+12•7;
F)5³-5²;
G)3³+3³+10
H)2 004•2 005+2 005;
Va rogg !
Dau coroana +multumesc
Multumesc!

Answer 1

A.)8*2+8*6=8*(2+6)=8*8=8^2;
B.)5*6+6=6*(5+1)=6*6=6^2;
C.)2^2+2^2+1=4+4+1=9=3^2;
D.)3^2+4^2-5^2=9+16-25=25-25=0=0^2;
E.)12*5+12*7=12*(5+7)=12*12=12^2;
F.)5^3-5^2=5^2*(5-1)=5^2*4=5^2*2^2=
(5*2)^2=10^2;
G.)3^3+3^3+10=27+27+10=64=8^2;
H.)2004*2005+2005=2005*(2004+1)= 2005*2005=2005^2.
"^" înseamnă ridicare la putere