22
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Unit Test

Question 22 • TX-Algebra II A-CR

The solution to 3x2 – 12x + 24 = 0 is .

Answer
A
7 or –7
B
2 + 2i or 2 – 2i
C
12 or –2

Explanation

For 3x² − 12x + 24 = 0, the discriminant is (−12)² − 4(3)(24) = 144 − 288 = −144. Using the quadratic formula gives x = (12 ± √−144)/6 = 2 ± 2i, so the solutions are 2 + 2i or 2 − 2i.

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