问题 计算题

解不等式:(3x+4)(3x-4)>9(x-2)(x+3)

答案

解:由原不等式得,9x2-12x+12x-16>9(x2+3x-2x-6),

                                             9x2-16>9x2+9x-54,

                                       9x2-9x2-9x>-54+16,

                                                  -9x>-38

单项选择题
单项选择题