<h5>If c&sup2;+d&sup2;=4 and (c-d)&sup2;=2, what is the value of cd?</h5>

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If c²+d²=4 and (c-d)²=2, what is the value of cd?

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If c²+d²=4 and (c-d)²=2, what is the value of cd?