解方程 x²+2√2x+2=0 (x-1)²-3(x-1)+2=0 (5x-4)²-(4x-3)²=0
问题描述:
解方程 x²+2√2x+2=0 (x-1)²-3(x-1)+2=0 (5x-4)²-(4x-3)²=0
答
x²+2√2x+2=0 (x+√2)²=0 x=-√2(x-1)²-3(x-1)+2=0 (x-1-2)*(x-1-1) x1=3 x2=2(5x-4)²-(4x-3)²=0 ((5x-4)+(4x-3))*((5x-4)-(4x-3))=0 x1=7/9 x2=1