初一数学习题,来帮帮我
解不等式:(5X-2)(2X-3)小于或等于(X+5)(10X-1)
参考答案:(5x-2)(2x-3)<=(x+5)(10x-1)
10x^2-19x+6<=10x^2+49x-5
-19x+6<=49x-5
11<=68x
x>=11/68
解不等式:(5X-2)(2X-3)小于或等于(X+5)(10X-1)
参考答案:(5x-2)(2x-3)<=(x+5)(10x-1)
10x^2-19x+6<=10x^2+49x-5
-19x+6<=49x-5
11<=68x
x>=11/68