展开 A(4,1)yB(3,-2)

解答

展开

A (4, 1) y B (3, - 2)

3 (4 \cdot 1,) A y B, - 2 (4 \cdot 1,) A y B

求解步骤

A (4, 1) y B (3, - 2)

= (4 \cdot 1,) (3, - 2) A y B

使用分配律:

a (b - c) = ab - a c

a = A (4, 1) y B, b = 3,, c = 2

= A (4, 1) y B \cdot 3, - A (4, 1) y B \cdot 2

= 3 (4 \cdot 1,) A y B, - 2 (4 \cdot 1,) A y B

e x p an d (x, y) (1, - 1) (x, y) (1, 1)

e x p an d - \frac{4 x - 1}{3 x ^{2}}

e x p an d \frac{2 ( n + 6 )}{n}

e x p an d (e^{x} - 1) (x + h)

e x p an d \frac{( k ( k + 2 ) + 1 )}{( k + 1 ) ( k + 2 )}