Mathematics
Junior High

教えてください

Answers

(3)は代入する際にカッコをつけましょう。
-x二乗=-(-4)×(-4)=-(16)=-16
(4)も同じです。
3×(-3)×(-3)-(-3)

3×(-3)×(-3)=+27

-(-3)=+3

3×(-3)×(-3)-(-3)=27+3=30

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