2(x-3)^=x^-9 (x+1)(x-3)=12 (3x+2)^=4(x-3)^

问题描述:

2(x-3)^=x^-9 (x+1)(x-3)=12 (3x+2)^=4(x-3)^
^表示平方,用适当的方式解

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