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One zero of x² − 7x + k is 3. Find k and the other zero.

Ak=12, other zero = 3
Bk=21, other zero = 7
Ck=10, other zero = 4
Dk=12, other zero = 4
Answer & Solution
Correct answer: D. k=12, other zero = 4
Sum of zeroes = 7, one is 3, so the other is 4. Product = 3 × 4 = 12 = k.
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