Question 12 • Algebra I
For x² − 5x − 4 = 0, a = 1, b = −5, and c = −4. The quadratic formula gives x = (5 ± √41)/2, since the discriminant is 25 + 16 = 41. The negative solution is (5 − √41)/2 ≈ −0.7, so the answer is negative 0.7.
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