作业帮3X²-12x-124X²-144=03X(X-1)=2(X-1)(2X-1)²=(3-X）²
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3X²-12x-124X²-144=03X(X-1)=2(X-1)(2X-1)²=(3-X）²
3X²-12x-12
4X²-144=0
3X(X-1)=2(X-1)
(2X-1)²=(3-X）²
3X²-12x-124X²-144=03X(X-1)=2(X-1)(2X-1)²=(3-X）²
3X²-12x-12=3(X²-4x-4)=3[(x-2)²-8]=3[(x-2-2√2)(x-2+2√2)
4X²-144=0 ,4(X²-36)=0 ,4(x+6)(x-6)=0 ,x=-6,x=6
3X(X-1)=2(X-1) ,
3X(X-1)-2(X-1)=0
(x-1)(3x-2)=0 ,x=1,x=2/3
(2X-1)²=(3-X）²,(2X-1)²-(3-X）²=[(2x-1)+(3-x)][(2x-1)-(3-x)]=(x+2)(3x-4)=0 ,x=-2,x=4/3