(8796-1102).(8796-1102)+8796+1102

=7694.7694+8796+1102

=59197636+8796+1102 

=59207534

=>7694 x 7694 + 8796 + 1102 = 59207534

(k) đúng cho mình

(8796-1102)x(8796-1102)+8796+1102=59207534

79845-x=1254

          x=79845-1254

          x=78591

78591 nha

x=78591

58889 nha

67685-8796=58889

58889

543+x=1254+105

543+x=1359

x=1359-543

x=816

x = 1254 + 105 - 543 

x = 816

543+x-105=1254

       543+x=1254+105

       543+x=1359

              x=1359-543

              x=816

\(7086+6547\)

\(=13633\)

\(6076+7534\)

\(=13610\)

\(7980+7088\)

\(=15068\)

\(8796+8764\)

\(=17560\)

` @ H A N `

$7086+6547$

$=13633$

$6076+7534$

$=13610$

$7980+7088$

$=15068$

$8796+8764$

$=17560$

=A*(2*2015+99*2015-101*2015)

=2015*A*(2+99-101)=0

1)

`x^2 -144=0`

`<=> x^2 =144`

\(< =>\left[{}\begin{matrix}x=12\\x=-12\end{matrix}\right.\)

2)`

`2x^2 -72=0`

`<=>2x^2 =72`

`<=>x^2=36`

\(< =>\left[{}\begin{matrix}x=6\\x=-6\end{matrix}\right.\)

3)

`5x^2 -125=0`

`<=> 5x^2 =125`

`<=>x^2 =25`

\(< =>\left[{}\begin{matrix}x=5\\x=-5\end{matrix}\right.\)

4)

`-x^2 +81=0`

`<=> x^2 -81=0`

`<=> x^2 =81`

\(< =>\left[{}\begin{matrix}x=9\\x=-9\end{matrix}\right.\)

5)

`x(2x-18)=0`

\(< =>\left[{}\begin{matrix}x=0\\2x-18=0\end{matrix}\right.\\ < =>\left[{}\begin{matrix}x=0\\x=9\end{matrix}\right.\)

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