(5x - 15)(x⁵ - 7776) = 0
5x - 15 = 0 hoặc x⁵ - 7776 = 0
*) 5x - 15 = 0
5x = 0 + 15
5x = 15
x = 15 : 5
x = 3
*) x⁵ - 7776 = 0
x⁵ = 0 + 7776
x⁵ = 7776
x⁵ = 6⁵
x = 6
Vậy x = 3; x = 6
Tìm x biết
1) \(\left(2x+3\right)\left(x-4\right)+\left(x-5\right)\left(x-2\right)=\left(3x-5\right)\left(x-4\right)\)
2)\(\left(8x-3\right)\left(3x+2\right)-\left(4x+7\right)\left(x+4\right)=\left(2x+1\right)\left(5x+1\right)-33\)
3)\(6x\left(3x+5\right)-2x\left(9x-2\right)+\left(17-x\right)\left(x-1\right)+x\left(x-18\right)-17x^2=0\)
4)\(\left(x-1\right)\left(x+2\right)-\left(x-3\right)+5x-7=0\)
Giúp mình nha. Camon nhiều
\(\left(\dfrac{1}{3}+\dfrac{12}{67}+\dfrac{13}{41}\right)-\left(\dfrac{79}{67}-\dfrac{28}{41}\right)\)
\(\left(\dfrac{15}{4}-5x\right)\cdot\left(9x^2-4\right)=0\)
\(\sqrt{x-2}+\dfrac{1}{3}=1\)
Tìm x:
a, \(x\left(x-2016\right)+2015\left(2016-x\right)=0\)
b, \(-5x\left(x-15\right)+\left(15-x\right)=0\)
c, \(x\left(x-9\right)+x-9=0\)
d, \(\frac{x+2}{327}+\frac{x+3}{326}+\frac{x+4}{325}+\frac{x+5}{324}=-4\)
e, \(\frac{45-x}{1963}+\frac{40-x}{1968}+\frac{35-x}{1973}+\frac{30+x}{1978}\)
Tìm x biết
\(a,-\frac{1}{2}\left(3x-1\right)+\frac{3}{4}\left(3-2x\right)=-3\left(\frac{x}{2}-1\right)-\left(\frac{4}{5}\right)^{-1}\)
\(b,\sqrt{9\left(5x-1\right)}-\sqrt{16\cdot\left(5x-1\right)}+\sqrt{36\left(5x-1\right)}=15\)
MÌNH ĐANG CẦN GẤP GIẢI CỤ THỂ GIÚP MÌNH NHA
Tìm x biết:
a) \(\left(x-3\right)^{x+5}-\left(x-3\right)^{x+15}=0\)
b)\(\frac{1+3y}{12}=\frac{1+5y}{5x}=\frac{1+7y}{4x}\)
tìm x,y biết:
a \(\left(x-7\right)^{x+1}-\left(x-7\right)^{x+11}=0\)
b \(\frac{5x-1}{3}=\frac{7y-6}{5}=\frac{5x+7y-7}{4x}\)
c \(\left|x+5\right|+\left(3y-4\right)^{2010}=0\)
Tìm x:
|5x-3|-3x=7
|x-3|+|x-5|-4x=-28
\(\left|x+2\right|+\left|x+\frac{3}{5}\right|+\left|x+\frac{1}{2}\right|=4x\)
\(\left|2x-1\right|+\left(4x^2-1\right)^2=0\)
\(\left(3x-2y\right)^{2020}+\left(5y-3z\right)^{2000}+\left|2z-5x\right|=0\) \(0\)
Và x+y-z= 5
Tìm x thỏa:
a. \(\left(5x+1\right)^2\)\(-\left(5x+3\right)\)\(\left(5x-3\right)\)= 30
b. \(\left(x+3\right)\)\(\left(x^2-3x+9\right)\)\(-x\left(x-2\right)\left(x+2\right)\)= 15
Ai đúng mik tk !!!
Chứng minh rằng nếu:
\(\frac{abc\left(b-c+a\right)-\left(ab\right)^2}{7776}=\frac{abc\left(c-a+b\right)-\left(bc\right)^2}{-19440}=\frac{abc\left(b-c+a\right)-\left(ca\right)^2}{-12960}\)
thì
\(4a=6b=9c\)
