Tolong iya dibantu , klau bisa secepatnya / . bsk dkumpulkan . No:11, 12,13, tolonglah . mohon dibantu Terima kasih

11)

[tex] \left[\begin{array}{ccc}2x+2&&3x+0\\\end{array}\right] \left[\begin{array}{ccc}x\\\\1\end{array}\right] =3[/tex]

      (2x+2) x + (3x).1   = 3
                 2x²+2x+3x  = 3
                 2x²+5x-3    = 0
               (2x-1)(x+3)  = 0
                2x-1 = 0  atau x+3 = 0
                     x = 1/2   atau  x = -3

12)

[tex]A^{2} = \left[\begin{array}{ccc}-2&4\\2&1\\\end{array}\right]. \left[\begin{array}{ccc}-2&4\\2&1\\\end{array}\right] [/tex]
      [tex]=\left[\begin{array}{ccc}4+8&-8+4\\-4+2&8+1\\\end{array}\right][/tex]
      [tex]=\left[\begin{array}{ccc}12&-4\\-2&9\\\end{array}\right][/tex]

  [tex]B^{T} =\left[\begin{array}{ccc}-2&3\\-1&1\\\end{array}\right][/tex]

  [tex]2A^{2} -B^{T}=\left[\begin{array}{ccc}24&-8\\-4&18\\\end{array}\right]-\left[\begin{array}{ccc}-2&3\\-1&1\\\end{array}\right][/tex]

[tex]=\left[\begin{array}{ccc}24&-8\\-4&18\\\end{array}\right]-\left[\begin{array}{ccc}-2&3\\-1&1\\\end{array}\right][/tex]

[tex]=\left[\begin{array}{ccc}26&-11\\-3&17\\\end{array}\right][/tex]

sisanya silahkan mencoba