展开 4(1/2 x+(sqrt(3))/2 y)

解答

展开

4 (\frac{1}{2} x + \frac{3}{2} y)

2 x + 23 y

求解步骤

4 (\frac{1}{2} x + \frac{3}{2} y)

使用分配律:

a (b + c) = ab + a c

4 (\frac{1}{2} x + \frac{3}{2} y) = 4 \cdot \frac{1}{2} x + 4 \cdot \frac{3}{2} y

= 4 \cdot \frac{1}{2} x + 4 \cdot \frac{3}{2} y

化简

4 \cdot \frac{1}{2} x + 4 \cdot \frac{3}{2} y : 2 x + 23 y

= 2 x + 23 y

e x p an d lo g_{10} (x y z)

e x p an d (x^{2} + y^{2} + z^{2})^{4}

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

e x p an d \frac{6}{( x + 2 ) ^{2}}

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