1.x²-3x-18≤0 2.-x²+x≥3x+1还有(2x+1)分之(2x²-x+1)>0解不等式
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![1.x²-3x-18≤0 2.-x²+x≥3x+1还有(2x+1)分之(2x²-x+1)>0解不等式](/uploads/image/z/995194-10-4.jpg?t=1.x%26%23178%3B-3x-18%E2%89%A40+2.-x%26%23178%3B%2Bx%E2%89%A53x%2B1%E8%BF%98%E6%9C%89%EF%BC%882x%2B1%EF%BC%89%E5%88%86%E4%B9%8B%EF%BC%882x%26%23178%3B-x%2B1%EF%BC%89%EF%BC%9E0%E8%A7%A3%E4%B8%8D%E7%AD%89%E5%BC%8F)
1.x²-3x-18≤0 2.-x²+x≥3x+1还有(2x+1)分之(2x²-x+1)>0解不等式
1.x²-3x-18≤0 2.-x²+x≥3x+1
还有(2x+1)分之(2x²-x+1)>0
解不等式
1.x²-3x-18≤0 2.-x²+x≥3x+1还有(2x+1)分之(2x²-x+1)>0解不等式
x²-3x-18≤0
(x-6)(x+3)≤0
-3≤x≤6
-x²+x≥3x+1
x²+2x+1≤0
(x+1)²≤0
x=-1