Question

Tolong bantu teman yg no. 1 dan no.3 please ya...

Answer 1

No 1

yp=-3 x=-2
xp=2 y=-11

y=a (x-xp)^2+yp
-11=a (-2-2)^2-3
-11=a (-4)^2-3
-8=16a
a=-1/2

xp=-b/2a
b=-2a × xp
=-2 (-1/2) 2
b=2

y= ax^2+bx+c
-11=-1/2 (2)^2 + 2 (-2) + c
-11=-2-4+c
c=-5


maka persamaan kuadrat
y=ax^2+bx+c
y=-1/2 x^2+2x-5