Yeo Kexin's answer to Guinervere's Secondary 3 A Maths Singapore question.
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The main point is: squares will always be positive because (-3)^2 or (3)^2 will always give you a positive number.
As such, you just have to ensure the remaining of the equation will also be positive for the entire equation to be positive!
As such, you just have to ensure the remaining of the equation will also be positive for the entire equation to be positive!
Date Posted:
4 years ago
It is much easier to do this question using the discriminant method instead of completing the square.
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