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Thời gian thực hiện: 5 tiết
TÍNH CHẤT CỦA PHÉP KHAI PHƯƠNG
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![Giáo án Khoa học tự nhiên 9 Chân Trời Sáng Tạo chủ đề Điện từ: [mô tả/định tính]](https://cdn.tailieu.vn/images/document/thumbnail/2025/20250815/quynhanh02/135x160/560_giao-an-khoa-hoc-tu-nhien-9-chan-troi-sang-tao-chu-de-4-dien-tu.jpg)
