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x+y = 1 so y = 1-x

xy = -56

Substitute,

x(1-x) = 56

or

-x2 + x -56 = 0

or you could multiply both sides by -1 and get

x2 - x + 56 = 0.

Solve that. You can use the quadratic formula with a = 1, b = -1, and c = 56

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7y ago

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