Ta có : \(\left(3x-1\right)^2-\left(x+7\right)^2=0\)
\(\left(3x-1+x+7\right)\left(3x-1-x-7\right)=0\)
\(\left(4x+6\right)\left(2x-8\right)=0\)
Nên : 4x + 6 = 0 hoặc 2x - 8 = 0
4x = -6 hoặc 2x = 8
x = \(\frac{-3}{2}\) hoặc x = 4
Vậy x = \(\frac{-3}{2}\) hoặc x = 4
cho M=((x+2/3x)+(2/x+1)-3):(2-4x/x+1)-(3x-3x^2+1/3x)
a. rut gon M
b. tim x sao cho M<1/3
c. tim xϵZ de MϵZ
giup mk vs, mk dang can gap a
Tim x : x^3-x^2-x+1=0
Chung minh 2x-2x^2-1<0 voi moi x
Giup vs
a.2x^3 (2x-3) -x^2 (4x^2 -6x+2)=0
b.(x+3)^2 + (x-2) ( x+2) - 2(x-1)^2=7
c.(3x +2)(x-1) -3(x+1) (x-2) =4
giúp mình nha
tim x biết
3x+4=0
2x*(x-1)-(1+2x)=-34
X^2+9x-10=0
(7x-1)*(2+5x)=0
tim x:
a)4x(x-5)-(x-1)(4x-3)=5
b)(3x-4)(x-2)=3x(x-9)-3
c)x^2-81=0
d)3x^2-75=0
e)x^2-14x+3=0
minh can gap. thank you
Giup minh voi:cho x,y,z khac 0 va x^3y^3+y^3z^3+x^3z^3=3x^2y^2z^2.tinh P=(1+x/y)(1+y/z)(1+z/x)
Tìm x:
a,x(4x^2-1)=0
b,3(x-1)^2-3x(x-5)-2=0
c,2x^2-5x-7=0
Tìm x, biết:
a)x(4x2-1)=0
b)3(x-1)2-3x(x-5)-2=0
c)x3-x2-x+1=0
d)2x2-5x-7=0
Tìm x, biết:
a)x(4x2-1)=0
b)3(x-1)2-3x(x-5)-2=0
c)x3-x2-x+1=0
d)2x2-5x-7=0