Efectuati: a) [x+1/5]^2+[3x/2-1/5]*[3x/2+1/5]+[x-1/5]^2
In caz ca nu stiti ce inseamna steluta aia = inmultire si ^ = la puterea


Răspuns :

x^2+ (2x)*1\5 + 1\25+ (9x^2)\4 - 1\25 + x^2 -(2x)*1\5 + 1\25=
2x^2 + (9x^2)\4 +1\25=
=(17x^2)\4 + 1\25 = (425x^2+4)\100