展开 2x(x+3=3(x-1))

解答

展开

2 x (x + 3 = 3 (x - 1))

2 x^{2} + 6 x = 3 x - 3

求解步骤

2 x (x + 3 = 3 (x - 1))

= 2 x (x + 3 \cdot 3 = (x - 1))

使用分配律:

a (b + c) = ab + a c

a = 2 x, b = x, c = 3 = 3 (x - 1)

2 xx + 2 x \cdot 3 = 3 (x - 1)

2 xx + 2 \cdot 3 x = 3 (x - 1)

化简

2 xx + 2 \cdot 3 x = 3 (x - 1) : 2 x^{2} + 6 x = 3 x - 3

2 x^{2} + 6 x = 3 x - 3

e x p an d (f \circ g) (x + 2)

e x p an d \frac{2}{3} + \frac{1}{5}

e x p an d \frac{( ( 1 + 16 π ^{2} ) ^{\frac{3}{2}} - 1 ) 2}{3}

e x p an d \frac{( - t ^{2} + 20 t - 62 ) ^{2}}{4}

e x p an d, a (1 - a - (\frac{( 1 - a - d )}{2})) - c a - i