Cho phương trình 3x2 + 7x + 4 = 0.
Xác định các hệ số a, b, c rồi tính a - b + c.
a = 3; b = 7; c = 4
⇒ a + b + c = 3 - 7 + 4 = 0
Viết bài văn nghị luận về tấm gương học tập của Nguyễn Hiền đi ạ:((
Choose the best answer.
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