Question

5-x(amandoua sub acelasi radical)=3x-1

Answer 1

√(5-x) = 3x - 1 ⇒ 5-x = (3x-1)² ⇒ 5-x = 9x² -6x+1 ⇒ 9x²-5x-4 = 0 ⇒

⇒ 9x² -9x +4x-4 =0 ⇒ 9x(x-1) +4( x-1) = 0 ⇒ (x-1)(9x+4) =0

x-1=0 ⇒ x=1

9x+4=0 ⇒ x = -4/9

S  = {-4/9,  1}