(2x-3)^2
(x+5)^2
help meee
(x-1)^2 = (2x-3)^2
help me
\(\Rightarrow\left(x-1\right)^2-\left(2x-3\right)^2=0\\ \Rightarrow\left(x-1-2x+3\right)\left(x-1+2x-3\right)=0\\ \Rightarrow\left(2-x\right)\left(3x-4\right)=0\\ \Rightarrow\left[{}\begin{matrix}x=2\\x=\dfrac{4}{3}\end{matrix}\right.\)
x^2+1/x+x/x^2+1=-5/2
help me! thanks
x^2 - 5x + 2 căn x +5 = 2
help meeeeeeeeee cần gấp ạ
Tìm x,biết
A)|x+5|+|x-3|=9
B)|x+1|+|x-2|+|x+3|=6
C)|x-2|+|x-3|+|x-4|=2
D)2|x+2|+|4-x|=11
E)|x-2|+|x-3|+|2x-8|=9
giúp mik vs nhanh đúng mình tik !HEPL MEEE
1) x^2-3x-1
2) 3x^2-5x-2
help
1:Ta có: \(x^2-3x-1\)
\(=x^2-2\cdot x\cdot\dfrac{3}{2}+\dfrac{9}{4}-\dfrac{13}{4}\)
\(=\left(x-\dfrac{3}{2}\right)^2-\dfrac{13}{4}\ge-\dfrac{13}{4}\forall x\)
Dấu '=' xảy ra khi \(x=\dfrac{3}{2}\)
tìm cực trị:y=(1-x)^3(3x-8)^2
help me!!!
TÌM X BIẾT :
1+3+5+...+(2x+1)=2601
ai nhanh mk tk !!!!!!!!!!!!! giúp mk nha!
HEPL MEEE!!
A = { \sqrt{x}\over\sqrt{x+2} } + { \sqrt{x}\over\sqrt{x-2} } -{ 2x+8\over\x-4 }
a) Rút gọn A
b)Tìm x thuộc Z để A là số nguyên âm
Helpp meee Helpp meee
help meee
Rút gọn phân thức
\(\dfrac{x^2+2x+1}{x^2+x}\)
Ta có:\(\frac{x^2+2x+1}{x^2+x}=\frac{\left(x+1\right)^2}{x\left(x+1\right)}=\frac{x+1}{x}\)