展开 A(3,4)yB(5,-1)

解答

展开

A (3, 4) y B (5, - 1)

5 (3 \cdot 4,) A y B, - 1 \cdot (3 \cdot 4,) A y B

求解步骤

A (3, 4) y B (5, - 1)

= (3 \cdot 4,) (5, - 1) A y B

使用分配律:

a (b - c) = ab - a c

a = A (3, 4) y B, b = 5,, c = 1

= A (3, 4) y B \cdot 5, - A (3, 4) y B \cdot 1

= 5 (3 \cdot 4,) A y B, - 1 \cdot (3 \cdot 4,) A y B

e x p an d p (- 3, 10) p (6, - 4)

e x p an d ((y + 1) e^{t} - x)^{2}

e x p an d (1, - 2) \cdot (x, y)

e x p an d (f \circ g) (x - y)

e x p an d 16 (4 π - 3)