(1)y(3y-5)=0(4)9X^2=(X-1)^2(6)X^2-4X=-4
y=0或y=5/3 (3X)^2=(X-1)^2 X^2-4X+4=0
(2)4X^2=12X(3X)^2-(X-1)^2=0 (X-2)^2=0
4X^2-12X=0 (3X+X-1)(3X-X+1)=0X=2
4X(X-3)=0 (4X-1)(2X+1)=0 (7)(2X-1)^2恒不為負(fù),無(wú)解
X=0或X=3X=1/4或X=-1/2 (8)(X-2)^2-2X(X-2)=0 (3)X^2+6X+9=0 (5)先將左邊展開(X-2)(X-2-2X)=0
(X+3)^2=0 2X^2-3X-4X+6=6(X-2)(-X-2)=0
X=-3 2X^2-7X=0 X=2或X=-2
X(2X-7)=0
X=0或X=7/2
2. x^2-2√3x+3=0
(X-√3)^2=0
X=√3
打這么多字也不容易,別忘了采納哦