Quadratic Sequence May/June 2023 Grade 12 Mathematics

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216 is actually a term in this sequence sir, you wrote -50 instead of -40

0= 5n² - 15n - 200
(Divide everything by 5)
0= n² - 3n - 40
0= (n - 8)(n +5)
n= 8 or n= -5
8 is the correct answer

rackzdoll