Question

Persamaan grqfik fungsi kuadrat yang memotong sumbu x dititik ( -2,0 )dan ( 2,0 )serta melalui titik ( 0,-4 )...

Answer 1

X1 = -2, x2=2, x=0,y=-4
y=a(x-x1)(x-x2)
-4 = a(0-(-2))(0-2)
-4 = -4a
a  = -4/-4 = 1


maka fungi kuadratnya
y = a(x-x1)(x-x2)
y = 1(x-(-2)) (x-2)
y = (x+2)(x-2)
y = x²-4