Find the area of the quadrangle with vertices Area = (5,1). (-4, 5). (-3,-4), and (4, -3).

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A: We use basic results from Linear Algebra

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A: A matrix A of size m by n. To prove that NA is a subspace of Rn, where NA is the null space of A.

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A: f(x)=ex and x∈[-1,2]

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