展开 A(3,-2)B(8,-5)

解答

展开

A (3, - 2) B (8, - 5)

3 A B, 8, - 3 A B, 5 - 2 \cdot 8 A B, 2 \cdot 5

求解步骤

A (3, - 2) B (8, - 5)

= (3, - 2) (8, - 5) A B

乘开

(3, - 2) (8, - 5) : 3, 8, - 3, 5 - 2 \cdot 8, 2 \cdot 5

= A B (3, 8, - 3, 5 - 2 \cdot 8, 2 \cdot 5)

乘开

A B (3, 8, - 3, 5 - 2 \cdot 8, 2 \cdot 5) : 3 A B, 8, - 3 A B, 5 - 2 \cdot 8 A B, 2 \cdot 5

= 3 A B, 8, - 3 A B, 5 - 2 \cdot 8 A B, 2 \cdot 5

e x p an d (3, 0, 3, 0) (2, - 2, - 2, 2) (- 1, x, 1, 1)

e x p an d \frac{4 ( 11 s + 10 )}{3}

e x p an d \frac{1}{( 2 - 6 x ) ^{5}}

e x p an d \frac{3 n + 5}{n ( n - 1 ) ( n - 2 )}

e x p an d \frac{( x + 1 ) ^{2}}{( x - 1 ) ( x - 3 )}