\(\left(5x+1\right)^2=\dfrac{36}{25}\)
\(\Leftrightarrow\left[{}\begin{matrix}5x+1=\dfrac{6}{5}\\5x+1=-\dfrac{6}{5}\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}5x=\dfrac{1}{5}\\5x=-\dfrac{11}{5}\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{1}{25}\\x=-\dfrac{11}{25}\end{matrix}\right.\)
Thu gon da thuc:
\(F\left(x\right)=x^2-3x^3-\sqrt{25}+\frac{1}{2}x-\left(-3x^3+\frac{5x}{2}-\sqrt{36}\right)\)
1)2/5-(3/5x-1/5)^3=14/1253
2)(2/3x-1/5)^2>4/25
3)(3/2x-5/6)^2<25/36
4)cho A=10^n +8 với n thuộc N.
tìm n nhỏ nhất để A chia hết cho 72
tìm x
a)2x nhân 5x =10x
b)(5x+1)2 =36/49
c)(x-1/2)3=1/27
d)(x+1/2)2=4/25
Tìm x,y,z biết
a) (x-2,5) : \(1\frac{1}{2}\)=x:2
b)y:40=36 : 26 và z :y=25:20 và x:z=0,65:1
c)x:y:z=3:5:(-2) và 5x-y+3z=-16
(5x+1)^2=36/49
\(5x-9=5+3x;2^3+0,5x=1,5;\left(5x+1\right)^2=\dfrac{36}{49};\left(\dfrac{-3}{81}\right)^x=-27;2^{x-1}=16\)
(5x+1)2=36 phan 49
1.17/25 - 5/41 + 8/25 -36/41 + 1/2
gia tri x thoa man (5x + 1 )^2=36/49
