Erfana Beevee Binte Hassan Shariff's answer to Isaac's Secondary 3 E Maths Singapore question.
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Expand LHS using (a-b)^2 =a^2-2ab+b^2, then bring RHS to LHS, making RHS=0. Apply formula to solve quadratic eqn since qn says to leave ur answers in 2d.p.
Date Posted:
9 months ago
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