Question

Menos 2X ao quadrado menos 5x mais 6 igual a zero

Answer 1

-2x²-5x+6=0

Δ = b2 - 4.a.c 
Δ = -52 - 4 . -2 . 6 
Δ = 25 - 4. -2 . 6 
Δ = 73

x = (-b +- √Δ)/2a

x¹=  (--5 + √73)/2.-2
x¹=13,54400374531753 / -4 
x¹=-3,3860009363293826

x²=(--5 - √73)/2.-2
x²= -3,5440037453175304 / -4
x²=0,8860009363293826

Answer 2

2
-2x - 5x + 6 = 0

X (- 2x - 5 +6) = 0

X=0 2x - 5 + 6 = 0 S= { 0 , - 1 }
2x = + 5 - 6 _
2x= -1 2
X = -1
-
2