12
QuizMultiple Choice

N/A — Exam

Question 12 • Algebra I

Joline is solving the equation 0 is equal to x squared minus 5 x minus 4 using the quadratic formula. Which value is the negative real number solution to her quadratic equation? Round to the nearest tenth if necessary. Quadratic formula: x is equal to the fraction with numerator negative b plus or minus square root of b squared minus 4 A c end root and denominator 2 A

Answer
A
negative 1
B
negative 4
C
negative 5 point 7
D
negative 0 point 7

Explanation

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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