What is the value of c2-d2 if, c+d=7 and c-d=-2? (2 is supposed to be square in c2-d2, keyboard issues)?

RaajM2017-04-30T01:50:42Z

c2- d2 = (c+d)(c-d)

c2 - d2 = (7)(-2)

c3 - d2 = -14

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