14 Bài tập Xác định hàm số bậc hai (có lời giải)

y = x + 1;

y = 2x² – 4;

y = 4x + 5;

y = 3x³ – 2x + 4.

y = 2x + 7;

y = 3x³ – 2x² – 1;

y = x² + 4x;

y = 4x² – x³.

y = 2x² – 7;

y = x³ – 2x² – x;

y = 2x² + 4x³;

y = x² – x³.

y = 2x² + 3x + 2;

y = x³ + 5x² – 2x;

y = 2x + 4x³;

y = x – 4.

y = 2x² + x – 3;

y = 2x – 2x² + x⁴;

y = x – 4x² + 1;

y = x² – 5x + 4.

y = 2x³ – 3;

y = – 2x² + x;

y = 4x – 4x²;

y = x² – 5.

y = (x – 1)²;

y = – 2x² + 5x – 1;

y = x – 4x² – 9;

y = \(\frac{1}{{3x}}\).

a = 6; b = –5; c = 3;

a = 3; b = 5; c = 6;

a = 3; b = –5; c = 6;

a = 6; b = 5; c = 3.

a = 1, b = 1, c = 6;

a = 1, b = 0, c = 6;

a = 1, b = 1, c = –6;

a = 1, b = 0, c = –6.

a + b – c = 1;

a – b – c = –1;

a + b + c = 3;

a – b + c = 3.