Question

5y²-2√15y+3=0 please explain

Answer 1

Answer:

square method:

 /5

   y²- 2√15y/5=-3/5

 y²-2√15y/5+(2√15/10)² =-3/5 +(2√15/10)²

 (y-2√15/10)²=- 3/5+30/5

 (y-2√15/10)²= -3+30/5

(y-2√15/10)²= 27/5

y-2√15/10= 3√3/√5

y=3√3/√5 + 2√15/10

y= (3√3)5√5/10+2√15/10

y=15√15+2√15 or  y=-15√15+2√15

y=17√15   or -13/√15