Question

x+y=-40 e x×y=200 qual o valor de x e y?​

Answer 1

x² - (x+y) X + x.y = 0

x² +40x + 200 = 0

∆= 1600 - 800 = 800 => √∆ = 20√2

x= -b+√∆/2a = -40+20√2/2 = -20+10√2 ✓

y= -b-√∆/2a = -40-20√2/2 = -20-10√2 ✓