x + 3
x - 3
x - 5
x + 5
Correct answer is C
Factorize 15 + 7x - 2x2 (5 - x)(3 + 2x); suppose 15 + 7x = 2x2 = 0 ∴ (5 - x)(3 + 2x) = 0 x = 5 or x = -\(\frac{3}{2}\) Since 5 is a root, then (x - 5) is a factor
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