你会直接开平方计算 (1) (2x-根号2)^2=0 (2)(2x-1)^2=9 (3) (x+3)^2=(1-2x)^2 (4) 3(1-2x)^2=48
问题描述:
你会直接开平方计算 (1) (2x-根号2)^2=0 (2)(2x-1)^2=9 (3) (x+3)^2=(1-2x)^2 (4) 3(1-2x)^2=48
答
解(2x-√2)²=0∴2x-√2=0∴x=√2/2(2x-1)²=92x-1=3或2x-1=-32x=4或2x=-2x=2或x=-1(x+3)²=(1-2x)²x+3=1-2x或x+3=-(1-2x)3x=-2或-x=-4∴x=-2/3或x=43(1-2x)²=48(1-2x)²=161-2x=4或1-2x=...