Răspuns :
Formulele de calcul prescurtat sunt "
(a+b)²=a²+2*a*b+b²
(a-b)²=a²-2*a*b+b²
(a+b)(a-b)=a²-b²
Tu acolo ai ridicari la putere
23²=529
45²=2025
49²=2401
97²=9409
103²=10609
195²=38025
(a+b)²=a²+2*a*b+b²
(a-b)²=a²-2*a*b+b²
(a+b)(a-b)=a²-b²
Tu acolo ai ridicari la putere
23²=529
45²=2025
49²=2401
97²=9409
103²=10609
195²=38025
23 e numar prim asa ca 23²=529sau 23=25-2 23²=(25-2)²=25²-100+4=625-100+4=529
49²=(50-1)²=50²-100+1=2500-100+1=2401
45²=(40+5)²=1600+400=25=2025
97²=(100-3)²=10000-600+9=9409
103²=(100+3)²=10000+600+9=10609
195²=(200-5)²=40000-2000+25=38025
49²=(50-1)²=50²-100+1=2500-100+1=2401
45²=(40+5)²=1600+400=25=2025
97²=(100-3)²=10000-600+9=9409
103²=(100+3)²=10000+600+9=10609
195²=(200-5)²=40000-2000+25=38025