展开 A(4,-5)B(0,-3)

解答

展开

A (4, - 5) B (0, - 3)

4 A B, 0, - 4 A B, 3 - 5 \cdot 0 \cdot A B, 5 \cdot 3

求解步骤

A (4, - 5) B (0, - 3)

= (4, - 5) (0, - 3) A B

乘开

(4, - 5) (0, - 3) : 4, 0, - 4, 3 - 5 \cdot 0, 5 \cdot 3

= A B (4, 0, - 4, 3 - 5 \cdot 0, 5 \cdot 3)

乘开

A B (4, 0, - 4, 3 - 5 \cdot 0, 5 \cdot 3) : 4 A B, 0, - 4 A B, 3 - 5 \cdot 0 \cdot A B, 5 \cdot 3

= 4 A B, 0, - 4 A B, 3 - 5 \cdot 0 \cdot A B, 5 \cdot 3

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