\(3x^2-x=4\)
\(\Leftrightarrow3x^2-x-4=0\)
\(\Leftrightarrow3x^2+3x-4x-4=0\)
\(\Leftrightarrow\left(x+1\right)\left(3x-4\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}x=-1\\x=\dfrac{4}{3}\end{matrix}\right.\)
\(3x^2-x=4\)
\(\Leftrightarrow3x^2-x-4=0\)
\(\Leftrightarrow3x^2+3x-4x-4=0\)
\(\Leftrightarrow\left(x+1\right)\left(3x-4\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}x=-1\\x=\dfrac{4}{3}\end{matrix}\right.\)
tìm x biết : x^5-x^4+3x^3+3x^2-x+1=0
Tìm x biết
3x(x-4)-x(5+3x)=-34
Tìm x biết a) 3x^2+x)4-3x)=12 b)3x^2-2x-1=0
Bài 1: tìm x biết
a, (3x+4)^2 - (3x-1) (3x+1)=49
b, (x+2) (x^2x+4) -x (x+3) (x-3)=26
1. Tìm x biết:
(3x - 4) (x - 2) = 3x(x - 9) - 3
tìm x biết rằng |x+1|+|x-3|+|3x-4| bé hơn hoặc bằng 3x
tìm x biết: (2x+3)(x-4)+(x-5)(x-2)=(3x-5)(x-4)
tìm x biết (3x + 4)^2 - ( 3x -1).(3x+1)
Bài 2: Tìm x, biết:
a/ 12x(x – 5) – 3x(4x - 10) = 120
b/ 9x(x + 4) – 5x(3x + 2) = 112 - 2x(3x + 1)
c/ 3x(1 – x) - 5x(3x + 7) = 154 + 9x(5 – 2x)