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secondary 2 | Maths
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Su
Su

secondary 2 chevron_right Maths chevron_right Singapore

Need help on this question, the answer given in the book is different. Is my working wrong? Thank you

Date Posted: 1 year ago
Views: 140
Cheng
Cheng
1 year ago
The calculation seems to be correct. could it be the question that is asking for sth else? or maybe can share the ans thats written in the book?

And also there is a mistake in your working:
you should write as (10a+6b)(b-3a)

not 10a + 6b(b-3a)
Su
Su
1 year ago
Thanks for the guidance. Ans in the book is -15a (power of 2)-8ab+6b (power of 2) . Unable to attach photo in this page to you :). Was puzzle how to get that ans

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Arnold K H Tan
Arnold K H Tan's answer
2124 answers (A Helpful Person)
1st
Your answer is correct. Consider expanding the terms in bracket first... to work with smaller numbers