Question

Y=-X²-4x+3 preciso da resposta

Answer 1

delta=b^2.a.c
delta=(-4)^2.(-1).3
delta=16.(-1).3
delta=16.-3
delta=-48

Logo Y é -48.

Answer 2

Y = - X^2 - 4X + 3
a = -1...b = - 4...c = 3

Formyla delta :
D = b^2 - 4 a c
D = (-4)^2 - 4 (-1) (3)
D = 16 + 4 (3)
D = 16 + 12
D = 28

Formula de braskara :
X = - b + , - \/D
......._________
................2a

X = - (-4) + , - \/28
.......___________
..................2(-1)

X1 = 4 + 5,29
........_______
...............-2

X1 = 9,29
........____
...........-2

X1 = - 4,645
X1 = -:4,65

X2 = 4 - 5,29
........._______
...............-2

X2 = - 1,29
.........._____
..............- 2

X2 = 0,645
X2 = 0,65