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3x 2x

2x²+1=3x 2x²-3x+1=0 x²-3/2x+1/2=0 x²-2×3/4x+(3/4)²-1/16=0 (x-3/4)²=1/16 x-3/4=±1/4 x=1/4+3/4=1 或者 x=3/4-1/4=1/2

(2x+1)/x-3x/(2x+1)=2 (2x+1)^2-3x^2=2x(2x+1) (2x+1)^2-2x(2x+1)-3x^2=0 (2x+1-3x)(2x+1+x)=0 (1-x)(3x+1)=0 x1=1 x2=-1/3

记得采纳哦 谢谢!

1/3x+5=1/2x 两边乘以6得 2x+30=3X 3x-2x=30 x=30 (1—25%)x=45—1/2x 75%x=45-1/2x 3/4x+1/2x=45 5/4x=45 x=36

=-X+2X-2-3X-5 =X-2-3X-5 =-2X-2-5 =-2X-7

2x²+1=3x 2x²-3x=-1 两边同除以2得: x²-3/2x=-1/2 (x-3/4)²=-1/2+9/16 (x-3/4)²=1/16 x-3/4=±1/4 x=(3±1)/4 x=1或x=1/2

(3x-1)(2x+1) =6x²+3x-2x-1 =6x²+x-1

(2x+3)(3x-2) 计算 =6x²-4x+9x-6 =6x²+5x-6 (2x-3)的平方(2x+3)的平方 =[(2x-3)(2x+3)]² =(4x²-9)² =16x^4-72x²+81 2(m+1)的平方-(2m+1)(2m-1) =2(m²+2m+1)-(4m²-1) =2m²+4m+2-4m&s...

如题:2x+2=3x-3 解:2x-3x=-3-2 (2-3)x=-5 即 -x=-5 所以得出 x=5 套入上题即为:2*5+2=3*5-3 即 12=12 正确!

2x²+1=3x 2x²-3x+1=0 2(x-3/4)²-9/8+1=0 ∴2(x-3/4)²=1/8 ∴x-3/4=±1/4 ∴x=1或1/2

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