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Verified answer
Sifat Grafik fungsi kuadraty = x² + 2x + 5
a = 1
b = 2
c = 5
..
a = 1 ---> a > 0
D = b² - 4ac
D = 2² - 4(1)(5)
D= 4 -20
D = - 16 --> D < 0
.
krn a > 0 dan D < 0 , maka sifat grafik
1. diatas sumbu x
2. tidak memotong sumbu x
3. terbuka ke atas