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Verified answer
Y= px² -4x + (p-2)a= p, b =-4 , c=p-2
nilai max =(b²-4ac)/(-4a)
1 = (16 -4p(p-2))/(-4p)
-4p = 16 - 4p² + 8p
4p²-12p-16=0
p²-3p -4 =0
(p-4)(p+1)=0
p=4 atau p = -1
untuk p= 4
y= 4x²-4x +2
sumbu simetri :
x = -b/2a = 4/8= ½
untuk p= -1
y= -x²-4x -3
sumbu simetri :
x= -b/2a= 4/-2 = -2
jadi sumbu simetri nya x= ½ atau x= -2
semoga bermanfaat