tsy's answer to Isaac's Secondary 1 Maths Singapore question.

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tsy
Tsy's answer
53 answers (A Helpful Person)
1st
Please correct me if I’m wrong.
Arnold K H Tan
Arnold K H Tan
2 years ago
3n² - n² = 2n²

Just use 2n² = 512
Thus n² = 256
n =16