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y = x2 + 2x + 1
zeros are:
0 = x2 + 2x + 1
0 = (x + 1)(x + 1)
0 = (x + 1)2
x = -1

So that the graph of the function y = x + 2x + 1 touches the x-axis at x = -1.

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15y ago

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