Answer:
The answer would be 21x2 − 75x + 36 = 0
Explanation:
21x2 − 75x + 36
75x − 36 = 21x2
21x2 + 75x − 36 = 0
3(x + 4)(7x − 3) = 0
x = −4 or x = 3/7
Thus, the unknown negative integer is −4.
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