Jawabanmu

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2014-02-25T11:53:22+07:00
F(x) = (x + 5)kuadrat + 8
f (12) = (12 + 5) (12 + 5) + 8
       =  289 + 8 = 297
1 5 1
2014-02-25T11:56:09+07:00

(x+5)2  + 8= 12

(x+5)2 = 4

X+5 =2

X = -3