Răspuns :
√(11²-2*11*155+15²)= √(11-15)²= |11-15|=4
√(48²-2*48*13+13²)=√(48-13)²= 48-13=35
√(48²-2*48*13+13²)=√(48-13)²= 48-13=35
Pentru cele doua exercitii se aplica formula de calcul prescurtat si anume:
a²-2·a·b+b²=(a-b)²
√11²-2·11·15+15²=
√(11-15)²=
|11-15|=4
√48²-2·48·13+13²=
√(48-13)²=
|48-13|=35
a²-2·a·b+b²=(a-b)²
√11²-2·11·15+15²=
√(11-15)²=
|11-15|=4
√48²-2·48·13+13²=
√(48-13)²=
|48-13|=35