\(\left|2x-3\right|-\left|3x+2\right|=0\)
\(\Rightarrow\left|2x-3\right|=\left|3x+2\right|\)
\(\Rightarrow2x-3=\pm\left(3x+2\right)\)
+) \(2x-3=3x+2\)
\(\Rightarrow-x=5\)
\(\Rightarrow x=-5\)
+) \(2x-3=-\left(3x+2\right)\)
\(\Rightarrow2x-3=-3x-2\)
\(\Rightarrow5x=1\)
\(\Rightarrow x=\frac{1}{5}\)
Vậy \(x\in\left\{-5;\frac{1}{5}\right\}\)
Tìm \(x\in Q\), biết:
\(\left|x-3\right|+\left|3x+4\right|-\left|2x+1\right|=0\)
tìm x
a) \(\frac{7^{x+2}+7^{x+1}7^x}{57}=\frac{5^{2x}5^{2x+1}5^{2x+3}}{131}\)
b) \(\left(2x+3\right)^2+\left(3x-2\right)^4=0\)
Thu gọn các biểu thức sau:
A = \(\left|x^2+2\right|+\left|-3x^2-2\right|-\left|-2x^2-2\right|\)
B = \(\left|2x-3\right|-\left|3x-2\right|-\left|4-2x\right|\) với x > 5
C = \(\left|3x-6\right|+\left|3x+10\right|\) với -2 < x < 2
D = \(\left|8-3x\right|+\left|x+2\right|\) với x < 2
E = \(\left|x-2\right|+\left|x-4\right|+\left|x-6\right|\) với x < 5
F = \(\left|\left(x-2\right)\left(x-4\right)\right|-\left|\left(4-x\right)\left(x-2\right)\right|\)
Tìm x , y biết :
a ) \(\left|x-y\right|+\left|x-9\right|=0\)
b ) \(\left|x^2-3x\right|+\left|\left(x+1\right).\left(x-3\right)\right|=0\)
Tìm x: \(\left(2x-1\right)^3-3\left(x+2\right)\left(x-3\right)=\left(3+2x\right)^3-3x\left(x+1\right)\)
Tìm x:
a)\(3x-\left|2x+1\right|=2\)
b)\(\left|3x-5\right|+\left|2x+3\right|=7\)
c)\(\left|x-\frac{1}{3}\right|+\frac{4}{5}=\left|\left(-3,2\right)+\frac{2}{5}\right|\)
Các bn làm đc câu nào thì làm nha . Help me
tìm x biết :
a) \(\frac{1}{4}+\frac{1}{3}:2x=-5\)
b) \(\left(3x+\frac{1}{4}\right).\left(x+\frac{1}{2}\right)=0\)
c) \(\left|2x-3,5\right|=28\)
Tìm x biết
a) \(-x^2.\left(x^2-4\right)=-25.\left(x^2-4\right)\)
b) \(x^2.\left(2\left|x\right|-3\right)=\left|x^2\right|.\left(2\left|x\right|-3\right)\)
c) \(\left(2x-6\right)^2=\left(3x+1\right)^{15}\)
d) \(2\left|x-3\right|-\left|4-x\right|=1\)
Tìm x: \(\left(x-2\right)^3+3\left(2x-3\right)^2=\left(3+x\right)^3-5\left(1+3x\right)^2-\left(x-1\right)\left(3-x\right)\)
