展开 (3x^2+x+3\circ x+4)(x)

解答

展开

(3 x^{2} + x + 3 \circ x + 4) (x)

3 x^{3} + x^{2} + 3 \circ x^{2} + 4 x

求解步骤

(3 x^{2} + x + 3 \circ x + 4) (x)

= (x) (3 x^{2} + x + 3 \circ x + 4)

打开括号

= (x) \cdot 3 x^{2} + (x) x + (x) \cdot 3 \circ x + (x) \cdot 4

= 3 x^{2} (x) + (x) x + 3 \circ (x) x + 4 (x)

化简

3 x^{2} (x) + (x) x + 3 \circ (x) x + 4 (x) : 3 x^{3} + x^{2} + 3 \circ x^{2} + 4 x

= 3 x^{3} + x^{2} + 3 \circ x^{2} + 4 x

e x p an d (x^{3} - 4 x y^{3}) (5 tan (5 t) sec (5 t))

e x p an d (A + B^{^{'}} + C) (A + B)

e x p an d 192 - 75 z^{225} z^{2} - 80 z + 64

e x p an d \frac{2 s ^{3} + 4 s ^{2} + 21 s + 9}{( s ^{2} + 9 ) ( s + 1 )}

e x p an d \frac{4 ( 3 - 2 )}{7}