(k+2)^2=k^2+4k+4 ;при k=6, m= -1
2m 2m
6^2+4×6+4 =36+28 =64 = -32
2×(-1) -2 -2
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(k+2)^2=k^2+4k+4 ;при k=6, m= -1
2m 2m
6^2+4×6+4 =36+28 =64 = -32
2×(-1) -2 -2