Solving Quadratic Equations: Zero Product Property
Question 5 • *WHS OH-Algebra I B-CR
One of the solutions to x2 − 2x − 15 = 0 is x = −3. What is the other solution?
Answer
A
x = −5
B
x = −1
C
x = 1
D
x = 5
Explanation
Factor the quadratic: x² − 2x − 15 = (x − 5)(x + 3). Its solutions are x = 5 and x = −3. Since −3 is already given, the other solution is x = 5, choice D.
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