Solutions to Quiz 2Bwww.math.ufl.edu/˜harringtSeptember 8, 20071. Factor Completely.(a)x2+ 7x+ 5Here we will use theAC-Method. TheAC= 5*1 = 5. However, there areno two numbersa, bsuch thata+b= 7 andab= 5. Hence, the polynomial isprime.(b) 2x2+ 7xy-4y2AC-Method: HereAC=-4*2 =-8.Futhermore,AC=-8 = 8*(-1) and 8-1 = 7 (The middle term.)Thus,2x2+ 7
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