解不等式组①(x-1)(x+2)大于等于(x+3)(x-3) 2(2x-1)(3x-5)大于6x平方-21能在有个过程吗?
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解不等式组①(x-1)(x+2)大于等于(x+3)(x-3) 2(2x-1)(3x-5)大于6x平方-21能在有个过程吗?
解不等式组①(x-1)(x+2)大于等于(x+3)(x-3) 2(2x-1)(3x-5)大于6x平方-21能在有个过程吗?
解不等式组①(x-1)(x+2)大于等于(x+3)(x-3) 2(2x-1)(3x-5)大于6x平方-21能在有个过程吗?
①(x-1)(x+2)>=(x+3)(x-3) ,
②(2x-1)(3x-5)>6x^2-21.
由①,x^2+x-2>=x^2-9,
x>=-7;
由②,6x^2-13x+5>6x^2-21,
-13x>-26,
x<2.
∴不等式组的解集为{x|-7<=x<2}.