Question

For what value of k,-4 is a zero of the polynomial x^2-x-(2k+2)^7

Answer 1

2x-x-(2k+2)7=0
2x-x-14k+14=0
Hence x=-4
Then,
2(-4)-(-4)-14k+14=0
-8+4-14k+14=0
-4-14k+14=0
-14k+10=0
-14k=-10
k=-10/-14 =5/7
k=5/7Answer.

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