x^9=12^2*12^7

解答

x^{9} = 1 2^{2} \cdot 1 2^{7}

x = 12

求解步骤

x^{9} = 1 2^{2} \cdot 1 2^{7}

化简

1 2^{2} \cdot 1 2^{7} : 1 2^{9}

对于

x^{n} = f (a)

，n 为奇数，解为

x = n f (a)

x = 9 1 2^{9}

9 1 2^{9} = 12

x = 12

x^{3} + 4 x^{2} + 9 x + 36 = 0

so l v e f or x, y = 3 x^{3} + 7

3 x^{3} - 4 x^{2} - 5 x + 2 = 0

x^{3} + x^{2} - 4 x + 6 = 0

3 x^{3} + 3 x^{2} - 6 x = 0