Question

rezolvati in multimea numerelor reale ecuatia :
5-0,5x²=0,4x²+1,4

Answer 1

5-0,5x^2=0,4x^2+1,4

-0,4x^2-0,5x^2=-5+1,4

-0,9x^2=-3,6

x^2=-3,6:(-0,9)

x^2=4

x=2