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secondary 3 | A Maths
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idununderstandasinglething
Idununderstandasinglething

secondary 3 chevron_right A Maths chevron_right Singapore

polynomials

Date Posted: 4 years ago
Views: 479
Daniel Yu
Daniel Yu
4 years ago
whats the question lmao
idununderstandasinglething
Idununderstandasinglething
4 years ago
find the values of the unknowns

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Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
1st
This is just one of the many ways to approach this question.

For such questions, two methods are regularly used. One is the comparing of relevant terms of x in the same power. The other is to substitute a specific value of x to the entire equation. You can use a single technique or a mix of both techniques or even use any other logical technique to obtain the values of the unknowns.
syjiaxuan
Syjiaxuan
4 years ago
Hi! I really liked the method u used, i actually used another method to help answer this persons question, I just uploaded a pic of it. Is my method correct too? I got the same ans as you
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syjiaxuan
Syjiaxuan's answer
290 answers (A Helpful Person)
Hope this helps
Eric Nicholas K
Eric Nicholas K
4 years ago
The full expansion method is definitely correct and is the ultimate method of solving such questions, since it lists out all the possible combinations of terms arising from the expansions.
syjiaxuan
Syjiaxuan
4 years ago
Agreed, I think this method (though Long) will be easier to understand right ? Tho is leaves lots of room for careless mistakes since lots of exapnsion
Eric Nicholas K
Eric Nicholas K
4 years ago
I presume this is the easiest method to understand for most people since we have listed out the combinations and can compare a like-to-like head on comparison of terms on both sides of the equation.

A good student solving such questions should not make elementary careless mistakes for such expansions.