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Diketahui(x1,0) ----> (3,0)
(x2,0) ----> (-2,0)
(x,y) ------>(0,-6)
fungsi kuadrat yang melalui (x1,0), (x2,0) , (x,y) adalah :
y= a(x-x1)(x-x2)
-6= a(0-3)(0-(-2))
-6=-6a
a=1
jadi fungsi kuadrat nya adalah
f(x)=1(x-3)(x-(-2))
f(x)=(x-3)(x+2)
f(x)= x²-x-6
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