tùy vào hướng truyền ánh sáng 

x⁴+4-36x²+36-x⁴+2x²-2x²-4

=(x⁴-x⁴)+(4-4)+(2x²-2x²-36x²)+36

=0+0-36x²+36

=còn lai dặt thừa số chung nha mình phải đi học rùi bye bye hêhhe

(x + 1)⁴ - 6(x + 1)² - (x² - 2)(x² + 2)

= (x² + 2x + 1)(x² + 2x + 1) - 6(x² + 2x + 1) - (x² - 2)(x² + 2)

= x⁴ + 2x³ + x² + 2x³ + 4x² + 2x + x² + 2x + 1 - 6x² - 12x - 6 - x⁴ + 4

= 4x³ - 8x - 1

\(\Rightarrow x-27=32\\ \Rightarrow x=59\)

7+x-21=45
7+x=66
x=59

\(\dfrac{3}{2}x+\dfrac{3}{7}=-\dfrac{4}{5}\)

\(\Leftrightarrow\dfrac{3}{2}x=-\dfrac{43}{35}\)

\(\Leftrightarrow x=-\dfrac{86}{105}\)

Vậy \(x=-\dfrac{86}{105}\)

\(-\dfrac{11}{12}x+0,25=\dfrac{5}{6}\)

\(\Leftrightarrow-\dfrac{11}{12}x+\dfrac{1}{4}=\dfrac{5}{6}\)

\(\Leftrightarrow-\dfrac{11}{12}x=\dfrac{7}{12}\)

\(\Leftrightarrow x=-\dfrac{7}{11}\)

Vậy \(x=-\dfrac{7}{11}\)

\(\left(x-2\right)^2=1\)

\(\Leftrightarrow\left(x-2\right)^2-1=0\)

\(\Leftrightarrow\left(x-2-1\right)\left(x-2+1\right)=0\)

\(\Leftrightarrow\left(x-3\right)\left(x-1\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x-3=0\\x-1=0\end{matrix}\right.\) \(\Leftrightarrow\left[{}\begin{matrix}x=3\\x=1\end{matrix}\right.\)

Vậy x = {3; 1}\(\left(2x-1\right)^3=-8\)

\(\Leftrightarrow2x-1=-2\)

\(\Leftrightarrow2x=-1\)

\(\Leftrightarrow x=-\dfrac{1}{2}\)

Vậy \(x=-\dfrac{1}{2}\)

       (x - 2)² = 1

<=>\(\left[{}\begin{matrix}x-2=1\\x-2=-1\end{matrix}\right.< =>\left[{}\begin{matrix}x=3\\x=1\end{matrix}\right.\)

Vậy x = 3; 1

(2x - 1)³ = -8

<=> 2x - 1 = -2

<=> 2x = -1

<=> x = \(\dfrac{-1}{2}\)

Vậy x = \(\dfrac{-1}{2}\)

Ta có: \(\left(0,25\right)^4.1024=\left(\frac{1}{4}\right)^4.32^2=\left[\left(\frac{1}{4}\right)^2\right]^2.32^2=\left(\frac{1}{16}\right)^2.32^2=\left(\frac{1}{16}.32\right)^2=2^2=4\)

Chúc bn hok tốt! 

(0.25-0.3x)x1/3-1/4=-5/16

(0.25-0.3x)x1/3=-1/16  (làm tắt)

0.25-0.3x=-1/16:1/3

0.25-0.3x=-3/16

0.3x=0.4375 =>x=35/24

Take off your hat it's hot.

( hot/ off/ Take/ it's/ hat/ your/ . )

=> Take off your hat it's hot.

Hc tốt