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For what value of x, matrix [(3 - 2x, x + 1), (2, 4)] is singular?

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For what value of x, matrix [(3 - 2x, x + 1), (2, 4)] is singular?

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For a singular matrix |A| = 0

12 - 8x - 2x - 2 = 0

- 10x = - 10

x = 1

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