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- Find the roots of the quadratic equation: x² + 2x - 15 = 0?
Question 1:
Find the roots of the quadratic equation: x² + 2x - 15 = 0? A. -5, 3
Feedback x² + 5x - 3x - 15 = 0
x(x + 5) - 3(x + 5) = 0
(x - 3)(x + 5) = 0
=> x = 3 or x = -5.
x(x + 5) - 3(x + 5) = 0
(x - 3)(x + 5) = 0
=> x = 3 or x = -5.
B. 3, 5
C. -3, 5
D. -3, -5
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