Mathematics, 03.02.2020 05:52, johnsonkia873

In the xy-plane, the line x + y=k, where k is a constant, is tangent to the graph of y=x^2+3x+1. what is the value of k?

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In the xy-plane, the line x + y=k, where k is a constant, is tangent to the graph of y=x^2+3x+1. wha...