Violympic toán 8
Các câu hỏi tương tự
tìm x biết
a)5(x+3)-2x(x+3)=0
b)6x\(\left(x^2-2\right)-\left(2-x^2\right)=0\)
c)\(\left(x+1\right)^2-\left(x+1\right)\left(x-2\right)=0\)
d)\(4x\left(x-2017\right)-x+2017=0\)
e)\(\left(x+4\right)^2-16=0\)
f)\(12x-x^2-36=0\)
Tìm x,biết:
a/x+5x^20Leftrightarrow......
b/x+1left(x+1right)^2Leftrightarrow..........
c/x^3+x0Leftrightarrow.......
d/5xleft(x-2right)-left(2-xright)0
e/xleft(2x-1right)+frac{1}{3}-frac{2}{3}x0Leftrightarrow........
g/xleft(x-4right)+left(x-4right)^20Leftrightarrow.....
h/x^2-3x0Leftrightarrow.....
i/4xleft(x+1right)8left(x+1right)Leftrightarrow.....
Đọc tiếp
Tìm x,biết:
a/\(x+5x^2=0\Leftrightarrow......\)
b/\(x+1=\left(x+1\right)^2\Leftrightarrow..........\)
c/\(x^3+x=0\Leftrightarrow.......\)
d/\(5x\left(x-2\right)-\left(2-x\right)=0\)
e/\(x\left(2x-1\right)+\frac{1}{3}-\frac{2}{3}x=0\Leftrightarrow........\)
g/\(x\left(x-4\right)+\left(x-4\right)^2=0\Leftrightarrow.....\)
h/\(x^2-3x=0\Leftrightarrow.....\)
i/\(4x\left(x+1\right)=8\left(x+1\right)\Leftrightarrow.....\)
Bài 3: Tìm x, biết:
a, \(x^3-16x=0\)
b, \(x^4-2x^3+10x^2-20x=0\)
c, \(\left(2x-3\right)^2=\left(x+5\right)^2\)
d, \(x^2\left(x-1\right)-4x^2+8x-4=0\)
Giải các phương trình sau :
a,\(\left(4x-3\right)\left(2x-1\right)=\left(x-3\right)\left(4x-3\right)\)
b,\(25x^2-9=\left(5x+3\right)\left(2x+1\right)\)
c,\(\left(3x-4\right)^2-4\left(x+1\right)^2=0\)
Giải các phương tình sau:
a) left(12x+7right)^2left(3x+2right)left(2x+1right)3
b)8left(x+dfrac{1}{x}right)^2+4left(x^2+dfrac{1}{x^2}right)^2-4left(x^2+dfrac{1}{x^2}right)left(x+dfrac{1}{x}right)^2left(x+4right)^2
c)2xleft(8x-1right)^2left(4x-1right)0
d)x^2-y^2+2x-4y-100 ( x,y là các số nguyên dương )
Đọc tiếp
Giải các phương tình sau:
a) \(\left(12x+7\right)^2\left(3x+2\right)\left(2x+1\right)=3\)
b)\(8\left(x+\dfrac{1}{x}\right)^2+4\left(x^2+\dfrac{1}{x^2}\right)^2-4\left(x^2+\dfrac{1}{x^2}\right)\left(x+\dfrac{1}{x}\right)^2=\left(x+4\right)^2\)
c)\(2x\left(8x-1\right)^2\left(4x-1\right)=0\)
d)\(x^2-y^2+2x-4y-10=0\) ( x,y là các số nguyên dương )
thực hiện phép tính:
a,\(\left(2x^3-x^2+5x\right):x\)
b,\(\left(3x^4-2x^3+x^2\right):\left(-2x\right)\)
c,\(\left(-2x^5+3x^2-4x^3\right):2x^2\)
d,\(\left(x^3-2x^2y+3xy^2\right):\left(\dfrac{-1}{2}x\right)\)
e,\(\left(3\left(x-y\right)^5-2\left(x-y\right)^4+3\left(x-y\right)^2\right):5\left(x-y\right)^2\)
Giải các phương trình sau:
a) x^2+dfrac{2x}{x-1}8
b) dfrac{x^2+2x+1}{x^2+2x+2}+dfrac{x^2+2x+2}{x^2+2x+3}dfrac{7}{6}
c) dfrac{x+4}{x-1}+dfrac{x-4}{x+1}dfrac{x+8}{x-2}+dfrac{x-8}{x+2}+6
d) left(x^2+6x+8right)left(x^2+8x+15right)24
e) left(x^2+x-2right)left(x^2+9x+18right)28
f) 3left(-x^2+2x+3right)^4-26x^2left(-x^2+2x+3right)^2-9x^40
g) x^4+6x^3+11x^2+6x+10
h) left(x-3right)left(x-5right)left(x-6right)left(x-10right)-24x^20
i) left(x+2right)^4+left(x+8right)^4272
Đọc tiếp
Giải các phương trình sau:
a) \(x^2+\dfrac{2x}{x-1}=8\)
b) \(\dfrac{x^2+2x+1}{x^2+2x+2}+\dfrac{x^2+2x+2}{x^2+2x+3}=\dfrac{7}{6}\)
c) \(\dfrac{x+4}{x-1}+\dfrac{x-4}{x+1}=\dfrac{x+8}{x-2}+\dfrac{x-8}{x+2}+6\)
d) \(\left(x^2+6x+8\right)\left(x^2+8x+15\right)=24\)
e) \(\left(x^2+x-2\right)\left(x^2+9x+18\right)=28\)
f) \(3\left(-x^2+2x+3\right)^4-26x^2\left(-x^2+2x+3\right)^2-9x^4=0\)
g) \(x^4+6x^3+11x^2+6x+1=0\)
h) \(\left(x-3\right)\left(x-5\right)\left(x-6\right)\left(x-10\right)-24x^2=0\)
i) \(\left(x+2\right)^4+\left(x+8\right)^4=272\)
29 tháng 3 2020 lúc 14:40
Giải phương trình:
a) \(\frac{4x-8+\left(4-2x\right)}{x^2+1}=0\)
b) \(\frac{x^2\left(x-3\right)}{x}=0\)
c) \(\frac{\left(x+2\right)\left(2x-1\right)-x-2}{x^2-x+1}=0\)
Tìm x, biết:
a) \(\left(2x-1\right)^2-4x^2+1=0\)
b) \(6x^3-24x=0\)
c) \(2x\left(x-3\right)-4x+12=0\)
d) \(x^3-5x^2+x-5=0\)