展开 sqrt(n)3(k+m)

解答

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n 3 (k + m)

3 k n + 3 m n

求解步骤

n \cdot 3 (k + m)

= 3 n (k + m)

使用分配律:

a (b + c) = ab + a c

3 n (k + m) = 3 n k + 3 n m

= 3 n k + 3 n m

= 3 k n + 3 m n

e x p an d \frac{( 2 x - 3 ) ( x + 1 )}{( x - 4 ) ( x + 3 )}

e x p an d \frac{x ^{2} ( x + 2 )}{2 ( 2 x + 9 ) ( x + 8 )}

e x p an d f oco (0, - 3)

s im pl i f y (x - 3) (x + 2)

e x p an d (- 2 x^{2} + x^{3} - 4 + x) l e f t (2 x + 1)