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secondary 3 | A Maths
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Nicole She
Nicole She

secondary 3 chevron_right A Maths chevron_right Singapore

Pls I Dun understand how to do Question (i)

Date Posted: 5 years ago
Views: 310
Christmas MT
Christmas MT
5 years ago
You can derive the second line by binomial expansion

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Jiayang
Jiayang's answer
1883 answers (Tutor Details)
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Nicole She
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6 answers (A Helpful Person)
Jia yang could u look at my answer and help me see what is wrong
Eric Nicholas K
Eric Nicholas K
5 years ago
Let me see...wait
Eric Nicholas K
Eric Nicholas K
5 years ago
The second expansion, be careful of the -ve sign when you expand
Eric Nicholas K
Eric Nicholas K
5 years ago
Negative (square root x)^1/2

You cannot bring the negative sign to the power

-x^0.5 is NOT the same as x^(-0.5)

So do the following terms.
Nicole She
Nicole She
5 years ago
Ok thank you Nicholas
Eric Nicholas K
Eric Nicholas K
5 years ago
So the expansion in the second version should look exactly like the first but instead of + + + + + +, you will get + - + - + - as the coefficients