<img alt="" src="https://core-ruangguru.s3.amazonaws.com/assets/ruang_belajar/questions/q_ndaswk4848.PNG" style="width: 200px; height: 97px;" />

dari pola di atas, diperoleh bahwa:

<img align="middle" alt="U subscript n equals a x squared plus b x plus c
d i m a n a space
2 a equals 2 rightwards arrow a equals 1
3 a plus b equals 8 rightwards arrow 3.1 plus b equals 8 rightwards arrow b equals 5
a plus b plus c equals 12 rightwards arrow 1 plus 5 plus c equals 12 rightwards arrow c equals 6
m a k a
U subscript n equals a x squared plus b x plus c rightwards arrow U subscript n equals x squared plus 5 x plus 6
U subscript 22 equals 22 squared plus 5 cross times 22 plus 6
U subscript 22 equals 600" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«mi»U«/mi»«mi»n«/mi»«/msub»«mo»=«/mo»«mi»a«/mi»«msup»«mi»x«/mi»«mn»2«/mn»«/msup»«mo»+«/mo»«mi»b«/mi»«mi»x«/mi»«mo»+«/mo»«mi»c«/mi»«mspace linebreak=¨newline¨/»«mi»d«/mi»«mi»i«/mi»«mi»m«/mi»«mi»a«/mi»«mi»n«/mi»«mi»a«/mi»«mo»§#160;«/mo»«mspace linebreak=¨newline¨/»«mn»2«/mn»«mi»a«/mi»«mo»=«/mo»«mn»2«/mn»«mo»§#8594;«/mo»«mi»a«/mi»«mo»=«/mo»«mn»1«/mn»«mspace linebreak=¨newline¨/»«mn»3«/mn»«mi»a«/mi»«mo»+«/mo»«mi»b«/mi»«mo»=«/mo»«mn»8«/mn»«mo»§#8594;«/mo»«mn»3«/mn»«mo».«/mo»«mn»1«/mn»«mo»+«/mo»«mi»b«/mi»«mo»=«/mo»«mn»8«/mn»«mo»§#8594;«/mo»«mi»b«/mi»«mo»=«/mo»«mn»5«/mn»«mspace linebreak=¨newline¨/»«mi»a«/mi»«mo»+«/mo»«mi»b«/mi»«mo»+«/mo»«mi»c«/mi»«mo»=«/mo»«mn»12«/mn»«mo»§#8594;«/mo»«mn»1«/mn»«mo»+«/mo»«mn»5«/mn»«mo»+«/mo»«mi»c«/mi»«mo»=«/mo»«mn»12«/mn»«mo»§#8594;«/mo»«mi»c«/mi»«mo»=«/mo»«mn»6«/mn»«mspace linebreak=¨newline¨/»«mi»m«/mi»«mi»a«/mi»«mi»k«/mi»«mi»a«/mi»«mspace 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