See Richard Sng's answer to Priscilla's Secondary 4 E Maths question

Richard Sng's answer to Priscilla's Secondary 4 E Maths question.

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Please clarify if unsure!

Date Posted: 7 years ago

Comments 3 add a comment

Priscilla

7 years ago

Hi, thank you very much. But it seems that there are 2 answers. +3,-3 or +4,-4. Thank you.

Richard Sng

7 years ago

For bi , you will have x=16 as an answer which will be rejected due to the range given for c(x). As bii did not specify the range, likewise you have to take the square root of 16 to give you +- 4 :)

Priscilla

7 years ago

I see. Tks very much!