展开 (y=4,)(z=-2)

解答

展开

(y = 4,) (z = - 2)

z (4 =, y) = - 2 (4 =, y)

求解步骤

(y = 4,) (z = - 2)

= (4 =, y) (= z - 2)

使用分配律:

a (b - c) = ab - a c

a = (y = 4,), b = z =, c = 2

(y = 4,) z = - (y = 4,) \cdot 2

z (4 =, y) = - 2 (4 =, y)

e x p an d (a^{^{'}} + b) c + ab c

e x p an d \frac{z - 5}{( z ^{2} - 10 z + 24 ) ^{2}}

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

e x p an d \frac{1}{2} cos (2 (x - π))

e x p an d \frac{14}{( s + 2 ) ( s + 14 )}