Question

2·[15 la puterea2-3 la puterea2·(x-5)]+2la puterea4·3laputerea2=3

Answer 1

2·[15²-3²·(x-5)]+2⁴·3²=3
2·[225-9·(x-5)]+16·9=3
 2·[225-9·(x-5)]+144=3
 2·[225-9·(x-5)]=-141
-9·(x-5)=-141/2-225
-9·(x-5)=(-141-450)/2
9·(x-5)=591/2
x-5=591/18
x=591/18+5=(591+90)/18=681/18=227/6