\(P=a^4\cdot b^7,\) where \(a^2=1\) and \(b^2=9.\) What is the value of \(P?\)

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\(P=a^4\cdot b^7,\) where \(a^2=1\) and \(b^2=9.\) What is the value of \(P?\)

(1) \(a < 0\)
(2) \(b < 0\)

Answer: B

Source: Magoosh