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Answer:
11, 5
Explanation:
Zeros are the values of x that make the product zero. The product will be zero if and only if one or more of the factors is zero.
x -11 = 0 ⇒ x = 11
x -5 = 0 ⇒ x = 5
The values x=11 and x=5 are zeros of the quadratic.