展开 (((0.1+x)(x)(0.1+3x)))/(((0.1-x)))

解答

展开

\frac{( ( 0.1 + x ) ( x ) ( 0.1 + 3 x ) )}{( ( 0.1 - x ) )}

\frac{0.01 x + 0.4 x ^{2} + 3 x ^{3}}{0.1 - x}

求解步骤

\frac{( 0.1 + x ) ( x ) ( 0.1 + 3 x )}{0.1 - x}

去除括号:

(a) = a

= \frac{( 0.1 + x ) x ( 0.1 + 3 x )}{0.1 - x}

乘开

(0.1 + x) x (0.1 + 3 x) : 0.01 x + 0.4 x^{2} + 3 x^{3}

= \frac{0.01 x + 0.4 x ^{2} + 3 x ^{3}}{0.1 - x}

e x p an d - x \cdot (8 x^{2} + 1)

e x p an d (x^{2} + 2 x) sin (x)

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

e x p an d (2, - 1, 1) (x yz)

e x p an d (4, - 1) y (2, 0)