Jeannie Chua's answer to Kathy's Secondary 4 A Maths Singapore question.
4y = 37y - 90 - 3y2
3y2 - 33y + 90 = 0
y2 - 11y + 30 = 0
(Not y2 - 11y + 10 = 0)
...
(Likely a miscomputation there)
3y2 - 33y + 90 = 0
y2 - 11y + 30 = 0
(Not y2 - 11y + 10 = 0)
...
(Likely a miscomputation there)
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