Toán Lớp 9: Cho pt ax^2+bx+c=0 có 2 nghiệm x_1, x_2\in [0; 1]. Tính GTLN: P=[(a-b)(2a-b)]/[a(a-b+c)]
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Toán Lớp 9: Cho pt ax^2+bx+c=0 có 2 nghiệm x_1, x_2\in [0; 1]. Tính GTLN: P=[(a-b)(2a-b)]/[a(a-b+c)]
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