What are the solution(s) to the quadratic equation x2 – 25 = 0?
Answer
A
x = 5 and x = –5
B
x = 25 and x = –25
C
x = 125 and x = –125
D
no real solution
Explanation
Add 25 to both sides to get x² = 25. Taking the square root gives x = 5 or x = −5, since both numbers square to 25. The correct choice is A, x = 5 and x = −5.
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