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=x²-4x+4
Titik Puncak {2,-8}
x=-b/2a y=b²-4ac/-4a
=4/2=2 =(-4)²-4(1)(-4)/-4(1)
=16+16/-4
=32/-4=-8
2) y=x²-4x+3
Titik Puncak {2,-1}
x=-b/2a y=b²-4ac/-4a
=4/2=2 =(-4)²-4(1)(3)/-4(1)
=16-12/-4
=4/-4=-1
3) y=x²+2x-8
Titik Puncak {-1,7}
x=-b/2a y=b²-4ac/-4a
=-2/2=-1 =(2)²-4(1)(-8)/-4(1)
=4-32/-4
=-28/-4=7
4) y=x²-2x-3
Titik Puncak {1,2}
x=-b/2a y=b²-4ac/-4a
=2/2=1 =(-2)²-4(1)(-3)/-4(1)
=4-12/-4
=-8/-4=2
5) y=4x²-4x-63
Titik Puncak {0,5,-256}
x=-b/2a y=b²-4ac/-4a
=4/8=0,5 =(-4)²-4(4)(-63)/-4(1)
=16+1008/-4
=1024/-4=-256
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