Consider the following for the next two (02) items that follow: Let p = x^4 - y^2z^2, q = y^4 - z^2x^2, r = z^4 - x^2y^2. What is px^2 + qy^2 + rz^2 equal to?
(x^2+ y^2 + z^2)(p + q + r)
'-(x^2+ y^2 + z^2)(p + q + r)
(y^2 + z^2 - x^2)(r - q - р)
(x^2 + y^2 - z^2)(p - q -r)
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Which among the following events happened earliest ?
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