✨ Best Answer ✨
2×9.8×0.2+0.7²
=2×(2×4.9)×0.2+0.49
=4×4.9×0.2+0.49
=4×(49×0.1)×0.2+0.49
=4×49×0.02+0.49
2×9.8×0.2+(0.7) ² まではわかるのですが
その次の=の式変形がわかりません🙇♀️🙇♀️
✨ Best Answer ✨
2×9.8×0.2+0.7²
=2×(2×4.9)×0.2+0.49
=4×4.9×0.2+0.49
=4×(49×0.1)×0.2+0.49
=4×49×0.02+0.49
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とてもわかりやすくてすぐ理解できました!
ありがとうございました🙇♀️🙌