NCV L3 Maths Question 2 - Algebra and Effective Tricks To Use

NCV Mathematics Question 2 previous exam paper revision with effective tricks you can use to answer the questions
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[@RG-ja34sep]

When you used the formula method to solve for k, you incorrectly wrote 2 instead of 4 (under the square root).
Please correct it.

[@roipop]

Hi, noted will look into it. Thank you.