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jawaban yang mungkin pilihan a dan c
2. Syarat dua akar real D≥0
D = b² - 4ac
pilihan a = 4x² + 7x + 4
7² - 4.4.4 ≥ 0
49 - 64 ≥ 0
-15 ≥ 0 ...........................salah
pilihan c = 2x² -5x + 2
(-5)² - 4.2.2 ≥ 0
25 - 16 ≥ 0
9 ≥ 0 ................................benar
jadi jawabannya c
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