alleryx²+ax+b leaves 3 on x−1 and 7 on x+1. Find (a,b).
A(−2,−4)
B(−2,4)
C(2,−4)
D(2,4)
Answer & Solution
Correct answer: B. (−2,4)
The equations 1+a+b=3 and 1−a+b=7 give a=−2 and b=4.
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