Brandon Ho's answer to Choo Jia Xuan's Secondary 3 A Maths question.

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Brandon Ho
Brandon Ho's answer
10 answers (Tutor Details)
Understanding of modulus is important. For example:
|x|=6 means
x can be 6 or -6. As modulus of positive of negative number will give u positive number. With that in mind, you can apply same concept for this question.