Question 6 • CMS 2026-2027 NC Math 2 CREDIT RECOVERY
Which shows the correct substitution of the values A , b , and c from the equation 0 is equal to negative 3 x squared minus 2 x plus 6 into the quadratic formula? 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
x is equal to the fraction with numerator negative 2 plus or minus square root of 2 squared minus 4 negative 3 6 end root and denominator 2 times negative 3
B
x is equal to the fraction with numerator negative negative 2 plus or minus square root of negative 2 squared minus 4 3 6 end root and denominator 2 times 3
C
x is equal to the fraction with numerator negative negative 2 plus or minus square root of negative 2 squared minus 4 negative 3 6 end root and denominator 2 times negative 3
D
x is equal to the fraction with numerator negative 2 plus or minus square root of 2 squared minus 4 3 6 end root and denominator 2 times 3
Explanation
Compare 0 = −3x² − 2x + 6 with ax² + bx + c = 0: a = −3, b = −2, and c = 6. Substituting into the formula gives x = (−(−2) ± √((−2)² − 4(−3)(6))) / (2(−3)). This matches choice C.
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