Question

Gráfico da função y=×2-4×-12

Answer 1

X^2 - 4X - 12 = 0
a = 1 ; b = -4 ; c = -12

FORMULA DELTA :
^^^^^^^^^^^^^^^^^^^^
D = b^2 - 4 a c
D = (-4)^2 - 4 (1) (-12)
D = 16 - 4 (-12)
D = 16 + 48
D = 64

FORMULA DE BRASKARA :
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
X = - b + ; - \|D
........_________
.................2a

X = - ( - 4 ) + ; - \|64
...... ____________
.....................2(1)

X = 4 + : - 8
.......______
..............2

X1 = 4 + 8
.........____
.............2

X1 = 12
.........___
...........2

X1 = 6

))))))))))))))))))))))))))))))))))))))))))

X2 = 4 - 8
..........____
.............2

X2 = - 4
...........___
.............2

X2 = - 2


S = { -2 ; 6 }