展开 (3x-4y)de(5x+2y)

解答

展开

(3 x - 4 y) d e (5 x + 2 y)

15 d e x^{2} - 14 d e x y - 8 d e y^{2}

求解步骤

(3 x - 4 y) d e (5 x + 2 y)

= d e (3 x - 4 y) (5 x + 2 y)

乘开

(3 x - 4 y) (5 x + 2 y) : 15 x^{2} - 14 x y - 8 y^{2}

= d e (15 x^{2} - 14 x y - 8 y^{2})

乘开

d e (15 x^{2} - 14 x y - 8 y^{2}) : 15 d e x^{2} - 14 d e x y - 8 d e y^{2}

= 15 d e x^{2} - 14 d e x y - 8 d e y^{2}

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e x p an d \frac{x ^{5} + x}{( x + 1 ) ^{2} ( x - 2 )}

e x p an d 6 (x - 3 = x + 2 + x)

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

s im pl i f y (2 u + \frac{2}{3} v)^{2}