x^2-  \(\frac{666}{24+13}=\frac{666}{37}=18\)

x²= 18+7

x²=25

=>x=5

tick đi nhé

x²  - 666/24 + 13 = 666/37 = 18

x² = 18 + 7

x² = 25 

=> x = 5 hoặc x = - 5

 tick cho mình nha

\(...\Rightarrow\left[{}\begin{matrix}288:\left(x-3\right)^2-2=0\\x^2-169=0\end{matrix}\right.\) \(\Rightarrow\left[{}\begin{matrix}288:\left(x-3\right)^2=2\\x^2=169\end{matrix}\right.\)

\(\Rightarrow\left[{}\begin{matrix}\left(x-3\right)^2=288:2\\x^2=13^2\end{matrix}\right.\) \(\Rightarrow\left[{}\begin{matrix}\left(x-3\right)^2=144=12^2\\x^2=13^2\end{matrix}\right.\)

\(\Rightarrow\left[{}\begin{matrix}x-3=12\\x-3=-12\\x=13\\x=-13\end{matrix}\right.\) \(\Rightarrow\left[{}\begin{matrix}x=15\\x=-9\\x=13\\x=-13\end{matrix}\right.\) \(\Rightarrow x\in\left\{-9;15;\pm13\right\}\)

a: =>3(x+3)²=26+49=75

=>(x+3)²=25

=>x+3=5 hoặc x+3=-5

=>x=2 hoặc x=-8

b: =>288:(x-3)²=50-8x6=2

=>(x-3)²=144

=>x-3=12 hoặc x-3=-12

=>x=15 hoặc x=-9

Kết quả đúng rồi đó                              

=-3720

đồ bấm máy tính ko chấp

1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31

+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+4

7+48+49+50-999-888-777-666-555-444-333-222-111= -3720

\(A=2\dfrac{3}{13}\times\dfrac{13}{58}\times8\times2\dfrac{15}{24}\times\dfrac{8}{21}\)

\(A=\dfrac{29}{13}\times\dfrac{13}{58}\times8\times\dfrac{21}{8}\times\dfrac{8}{21}\)

\(A=\dfrac{29\times13\times8\times21\times8}{13\times58\times8\times21}\)

\(A=\dfrac{1\times1\times1\times1\times8}{1\times2\times1\times1}\)

\(A=\dfrac{8}{2}\)

\(A=4\)

\(A=\dfrac{29}{13}\cdot\dfrac{13}{58}\cdot8\cdot\dfrac{21}{8}\cdot\dfrac{8}{21}=\dfrac{1}{2}\cdot8=4\)

x =0;

x=0;

x=0.

k cho mình nhé.

( x - 3 )2 là ( x - 3 ) .2 à