Question

equação do 2°grau alternativa b,c,d,e,f

Answer 1

b)  y^2 - 7y + 12 = 0
(y-4) (y-3) = 0
y= 4
y=3

c) x^2 -5x - 6= 0
(x-6) ( x +1)=0
x= 6
x= -1

d) ???

e) y^2 - 2y -3=0
(y-3) ( y+1)=0
y= 3
y= -1

f)x^2 + 8x+15=0
 (x+5)(x+3)=0
x= -5
x= -3