展开 ((m^2-mn))/(7(m+4n))

解答

展开

\frac{( m ^{2} - mn )}{7 ( m + 4 n )}

\frac{m ^{2} - mn}{7 m + 28 n}

求解步骤

\frac{m ^{2} - mn}{7 ( m + 4 n )}

乘开

7 (m + 4 n) : 7 m + 28 n

= \frac{m ^{2} - mn}{7 m + 28 n}

e x p an d 4 x (x - y \mp z)

e x p an d A (3, 4, 1) B (0, 2, - 5)

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

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

e x p an d \frac{( ( n + k ) ( n + k ) ! )}{k ! n !}