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secondary 3 | A Maths
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secondary 3 chevron_right A Maths chevron_right Singapore

need help for 7b please

Date Posted: 5 months ago
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Arnold K H Tan
Arnold K H Tan's answer
835 answers (A Helpful Person)
Focus on creating a quadratic equation, if there is a term with power 2 in the question. Sometimes, you have to simplify using the double angle formula.