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March 25, 2017

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Solve the following system of linear equations by graphing. (If the system has no solution, enter NONE for each answer. If the system is dependent, enter INFINITELY MANY for each answer.)
7x+2y=0
2x-7y=0

x =
y =

  • math - ,

    The determinant of the left-hand side is
    |7 2 |
    |2 -7|
    =-49-4
    =-53
    which is non-zero. This implies that the system is not dependent.

    So apart from the trivial solution of x=0 and y=0, there is no non-trivial solution.

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