TOH CHONG CHENG's answer to Shyann's Secondary 3 A Maths Singapore question.

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TOH CHONG CHENG
Toh Chong Cheng's answer
8 answers (Tutor Details)
1st
Hope you understand. And highest degree of power will determine the total number of roots, which in this case is 3. The rest of the work is to determine how many are REAL roots.