解一元二次不等式:①x²+2x-3≤0
问题描述:
解一元二次不等式:①x²+2x-3≤0
①x²+2x-3≤0
②x-x²+6<0
③4x²+4x+1≥0
④x²-6x+9≤0
⑤-4+x-x²<0
求过程解答,谢谢O(∩_∩)O了!
答
①x²+2x-3≤0(x+3)(x-1)≤0-3≤x≤1②x-x²+6<0-x²+x+6<0x²-x-6>0(x+2)(x-3)>0x<-2或x>3③4x²+4x+1≥0(2x+1)²≥0x≠-1/2④x²-6x+9≤0(x-3)²≤0x=3⑤-4+x-x²<0x...