It is known that the absolute value of K of the polynomial. XY - 4 / 7 (K-2) y to the second power + 5 is a cubic trinomial of. XY. Find the value of K In class. I didn't listen to the teacher carefully. Please elaborate.
lkl=2
k=±2
Because K-2 ≠ 0
k≠2
So k = - 2
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