Question

Решите уравнение: (10х+1)(10х-1)=4(3-(5х-1)²)

Answer 1

(100х^2-1)=4(3-(25х^2-10х+1)), (100х^2-1)=-100х^2+40х+8, 200х^2-40х-9=0 Д=1600+7200=8800, Х1=(40+ √8800)/400=0,33 Х2=(40- √8800)/400=-0,13