Question

completando cuadrados resolucion de y(y+5)=4

Answer 1

y(y+5)=4 
y²+5y+(5/2)²- (5/2)² - 4=0
(y+5/2)² - (25/4) - 4 = 0
(y+5/2)² - 41/4 = 0
(y+5/2)² - (√41/2)² = 0 
(y+5/2-√41/2)(y+5/2+√41/2)=0
(y+5/2-√41/2)=0    (y+5/2+√41/2)=0
     Y=√41/2-5/2            Y=-5/2-√41/2
     Y=(√41-5)/2             Y= (-5-√41)/2