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secondary 4 | A Maths
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chocolatebanana
Chocolatebanana

secondary 4 chevron_right A Maths chevron_right Singapore

please help! thankyou!

Date Posted: 1 month ago
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Eric Nicholas K
Eric Nicholas K's answer
2938 answers (Tutor Details)
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The workings are quite a mess. Substitution in the indices question and simplification + rationalisation of surds in the surds question are needed.
chocolatebanana
Chocolatebanana
1 month ago
thankyou!! i will try understanding!!
Eric Nicholas K
Eric Nicholas K
1 month ago
For part a we are limited to using that formula, so using substitution will be wise here.

For part b you can rationalise immediately, but then the number gets very big.
chocolatebanana
Chocolatebanana
1 month ago
okay sure thankyou so much!