Question 931812
 (5v + 4)(4v – 7)
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<font size=3 color="red">F</font>	First terms
<font size=3 color="red">O</font>	Outside terms + <font size=3 color="red">I</font>	Inside terms = -19x
<font size=3 color="red">L</font>	Last terms
.......
C.20v2 &#8722; 19v &#8722; 28