\(\Leftrightarrow\left[{}\begin{matrix}3x+1=5\\3x+1=-5\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{4}{3}\\x=-2\end{matrix}\right.\)
\(\left(3x+1\right)^2=25\)
Tìm x
\(\frac{1}{10}+\frac{1}{40}+\frac{1}{88}+...+\frac{1}{\left(3x+2\right).\left(3x+5\right)}=\frac{4}{25}\)
Tìm x:
a)\(2.\left(3x-\frac{1}{2}\right)-2x=\frac{1}{2}\left(2x-3\right)\)
b)\(\left(2x-\frac{3}{5}\right)^2=\frac{4}{25}\)
c)\(\left(3x-1\right)^3=27\)
d)\(5-\left|x\right|=2\)
e)|2x+1|-3=3
f)|3-2x|=5
\(\left(5-x\right)\left(3x-\frac{1}{4}\right)=0\)
Thu gon da thuc:
\(F\left(x\right)=x^2-3x^3-\sqrt{25}+\frac{1}{2}x-\left(-3x^3+\frac{5x}{2}-\sqrt{36}\right)\)
Tìm x,y,z ,biết:
\(a,5^{3x+1}=25^{x+2}\)
\(b,\left(3x-1\right)^{200}=\left(1-3x\right)^{197}\)
\(c,\left(x-\frac{1}{2}\right)^{100}+\left(y-4\right)^{102}\)
\(đ,\left(\frac{1}{2}x+1\right)^2+\left(\frac{2}{3}y-1\right)^2+|x-y-z|\le0\)
Tìm a,b,c, biết\(ab=2,bc=3,ca=54\)
Giải đầy đủ nhé!
\(A=\frac{2^{12}x3^5-4^6x9^2}{\left(2^2x3\right)^6+8^4x3^5}-\frac{5^{10}x7^3-25^5x49^2}{\left(125x7\right)^3+5^9x14^3}\)
\(B=\frac{\left(\frac{-1}{2}\right)^3-\left(\frac{3}{4}\right)^3x\left(-2\right)^2}{2x\left(-1\right)^5+\left(\frac{3}{4}\right)^2-\frac{3}{8}}\)
\(C=2^2+3\left(\frac{1}{2}\right)^0-2^{-2}+\left[\left(-2^2\right):\frac{1}{2}\right]:8\)
Rút gọn các biểu thức :
a, \(\left(3x+5\right)^2+\left(3x-5\right)^2-\left(3x+2\right)\left(3x-2\right)\)
b, \(2x\left(2x-1\right)^2-3x\left(x+3\right)\left(x-3\right)-4x\left(x+1\right)^2\)
\(c,\left(x+y-z\right)^2+2\left(z-x-y\right)\left(x+y\right)+\left(x+y\right)^2\)
tìm số nguyên x, biết:
a, \(\left(\frac{1}{5}\right)^x=\left(\frac{1}{125}\right)^3\)
b, \(\left(\frac{3}{5}\right)^x=\left(\frac{9}{25}\right)^3\)
c,\(2^{3-2x}=8^3\)
d, \(2^{3x+1}=32^2\)
e, \(3^{6-3x}=81^3\)
Tìm x biết
a) \(-x^2.\left(x^2-4\right)=-25.\left(x^2-4\right)\)
b) \(x^2.\left(2\left|x\right|-3\right)=\left|x^2\right|.\left(2\left|x-3\right|\right)\)
c) \(\left(2x-6\right)^2=\left(3x+1\right)^5\)
d) \(2\left|x-3\right|-\left|4-x\right|=1\)
