18. What should be added in the polynomial x ^ 3 + 2x ^ 2 - 9x + 1 so that it is completely divisible by x + 4
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Answer:
Step-by-step explanation:
x+4= 0
x=-4
-4 *-4*-4 +2*-4*-4 -9*-4+1
-64 +32 +36+1
-64+68+1
= 5
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