2（x+5)^2-(x+6)^2-(x+2)(x-2)=42
2x²+20x+50-x²-12x-36-x²+4=42
8x=-12
x=-3/2
(2x+1)(x-3)-(2x+3)(x-1)大于等于12
2x²-x-3-2x²-x+3>=12
-2x>=12
x
2（x+5)^2-(x+6)^2-(x+2)(x-2)=42 (2x+1)(x-3)-(2x+3)(x-1)大于等于12
3个回答
相关问题
-
3x-7/5大于等于x-2/2,x/4-2x-1/12大于1/6-x/3
-
一元一次方程,1.-1/3x大于等于12.3x+57-3x4.1/3x大于等于2+1/2x5.2x+4-17.(x+1)
-
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
-
(2x+1)(x-3)-(2x+3)(x-1)大于等于12的解
-
5x+125小于等于0 6-2x大于0 —x+1大于7x-3 2(1-3x)大于3x+20 2分之2x-1小于2分之x
-
(x-3)/2-(2x+1)/3=1 x-(3-2x)/2=1-(x+2)/6 (3x+1)/12-(1-5x)/8=1
-
5(x+3.2-2.4)=7.6 1.2x+2.42=3+x
-
(x-1)(x-2)+(x-2)(x+3)-2(x-3)(x-4)＞＝（大于等于）-4
-
解方程：（1）[2/1+x−31−x＝6x2−1]（2）[2x−3/x−1]=2x−42x+3+1．
-
解三次方不等式2x^3+x^2-5x+2大于04（2x-3)^2(x+1)小于0 x^2-9大于等于(x+3)(x^2-