1.解方程(2x-3)^2+1=(3x-1)^2-5(x+3)(x-3) 2.解不等式(3x+2)(2-3x)<5x-9(x-6)(x+1)
问题描述:
1.解方程(2x-3)^2+1=(3x-1)^2-5(x+3)(x-3) 2.解不等式(3x+2)(2-3x)<5x-9(x-6)(x+1)
答
(2x-3)^2+1=(3x-1)^2-5(x+3)(x-3) 4x^2-12x+9+1=9x^2-6x+z-5x^2+45-36=6xx=-6(3x+2)(2-3x)<5x-9(x-6)(x+1)(2+3x)(2-3x)<5x-9x^2+45x+544-9x^2<-9x^2+50x+54-50<50xx>-1