Question 6 • CMS 2026-2027 NC Math 1 CREDIT RECOVERY
Theo started to solve the quadratic equation (x+2)2−9=−5. He added 9 to both sides and the resulting equation was (x+2)2=4. Next, he took the square root of each side. Which was the resulting equation of that step?
Answer
A
x plus 2 is equal to plus or minus 4
B
x plus 2 is equal to plus or minus 8
C
x plus 2 is equal to plus or minus 16
D
x plus 2 is equal to plus or minus 2
Explanation
Taking the square root of both sides of (x + 2)² = 4 gives x + 2 = ±√4. Since √4 = 2, the resulting equation is x + 2 = ±2, which is choice D.
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