规定“⊙”的运算法则为:a⊙b=a²+2ab 3⊙(﹣2)=3²+2×3×﹙﹣2﹚=﹣3(1)求2⊙3(2)化简k⊙2+(﹣1)⊙k
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规定“⊙”的运算法则为:a⊙b=a²+2ab 3⊙(﹣2)=3²+2×3×﹙﹣2﹚=﹣3(1)求2⊙3(2)化简k⊙2+(﹣1)⊙k
规定“⊙”的运算法则为:a⊙b=a²+2ab 3⊙(﹣2)=3²+2×3×﹙﹣2﹚=﹣3
(1)求2⊙3
(2)化简k⊙2+(﹣1)⊙k
规定“⊙”的运算法则为:a⊙b=a²+2ab 3⊙(﹣2)=3²+2×3×﹙﹣2﹚=﹣3(1)求2⊙3(2)化简k⊙2+(﹣1)⊙k
(1)求2⊙3
=2²+2×2×3
=4+12=16
(2)化简
k⊙2+(﹣1)⊙k
=k²+2k×2+(-1)²+2×(-1)×k
=k²+4k+1-2k
=k²+2k+1