Matematika

Pertanyaan

nilai x yg memenuhi persamaan [tex] \left[\begin{array}{ccc}0&-3&5\\2x-3&1&3x\\-2&-2&1\end{array}\right] = -4x+19 adalah [/tex]
mohon di bantu ya

1 Jawaban

  • [tex][tex] \left[\begin{array}{ccc}0&-3&5\\2x-3&1&3x\\-2&-2&1\end{array}\left[\begin{array}{ccc}0&-3\\2x-3&1\\-2&-2\end{array}\right] =-4x+19[/tex]

    [0.1.1 + (-3).3x.(-2)+5(2x-3)(-2)] - [ 5.1(-2)+0(3x)(-2)+(-3)(2x-3).1] = -4x+19

    [0+18x-20x+30] - [-10+0-6x+9] = -4x+19
            
    [-2x+30] - [-6x-1] = -4x+19

    -2x+6x+30+1 = -4x+19

    4x+31 = -4x+19
    4x+4x = 19-31
          8x = -13
            x = -13/8
          

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