展开 3x(5x+2)

解答

展开

3 x^{\circ} (5 x + 2)

3 \cdot 5 x x^{\circ} + 3 \cdot 2 x^{\circ}

求解步骤

3 x^{\circ} (5 x + 2)

使用分配律:

a (b + c) = ab + a c

a = 3 x^{\circ}, b = 5 x, c = 2

= 3 x^{\circ} \cdot 5 x + 3 x^{\circ} \cdot 2

= 3 \cdot 5 x x^{\circ} + 3 \cdot 2 x^{\circ}

e x p an d e (3 e^{2} - 5 e + 7)

e x p an d \frac{1}{( 6 + e ) ln ( 3 + e )}

e x p an d 5 (\frac{4 x - 3}{25})

e x p an d \frac{1}{5} (e^{5 x} - e^{15})

e x p an d 2 (x + h) + 3 - 2 (x) + 3