用适当的方法解方程 9[2a-5]2-4=0
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/18 14:06:39
解题思路:用分解因式法则进行求解解题过程:解:
﹙1﹚﹙2x-1﹚²/3=﹙1-2x﹚/44﹙2x-1﹚²+3﹙2x-1﹚=0﹙2x-1﹚﹙8x-4+3﹚=0﹙2x-1﹚﹙8x-1﹚=0x1=1/2x2=1/8﹙2﹚2√3x=√
7x²=5x7x²-5x=0x(7x-5)=0x1=0,x2=5/7
(3-y)²+y²=92y平方-6y=0y(y-3)=0y1=0y2=3(2x-1)²-5(2x-1)-6=0(2x-1-6)(2x-1+1)=02x(2x-7)=0x1
(1)4x(x-3)-3(3-x)=0,(x-3)(4x+3)=0,x-3=0,4x+3=0,x1=3,x2=-34;(2)2x2-3x-6=0,2x2-3x=6,x2-32x=2,配方得:x2-32
(3x+1)²=(2x-3)²(3x+1)²-(2x-3)²=0[(3x+1)+(2x-3)][(3x+1)-(2x-3)]=0(5x-2)(3x+1-2x+3
方程分解因式得:(3x+1)(x-2)=0,可得3x+1=0或x-2=0,解得:x1=-13,x2=2.
(1)方程变形得:(2x+1)2=0,解得:x1=x2=-12;(2)方程变形得:4(x-1)2=9(x-5)2,开方得:2(x-1)=±3(x-5),解得:x1=12,x2=174;(3)分解因式得
解2x²-5x=12x²-5x-1=0公式法a=2,b=-5,c=-1△=b²-4ac=25+8=33∴x=(5+√33)/4x=(5-√33)/4
1.3x(x-1)=x(x+5);x(3(x-1)-(x+5))=0;x(2x-8)=0;x=0,x=42.2x^2-3=5x;2x^2-5x-3=0;(2x+1)(x-3)=0;x=-0.5,x=3
把x提出得x(根号2-1-2x)=0x1=0x2=(根号2-1)/2尽量不要消带有x的项会漏根
再答:采纳一下,好吗?谢谢了再问:能打字吗,图显示不出来,拜托了再答:手机上很不方便的3x^2+6x=5x^2+2x=5/3x^2+2x+1=8/3(x+1)^2=8/3∴x=-1+2√6/3x=-1
(a²-b²)x²+2(a²+b²)x+(a²-b²)=0,a+b≠0,a-b≠0a²x²+2a²x
(x-a/2)²-b²=0(x-a/2+b)(x-a/2-b)=0x=a/2-b,x=a/2+