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secondary 3 | A Maths
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Binomial theorem question. Please help
Date Posted: 1 year ago
Views: 259
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In the second last step before the (proved), O think the first two brackets are missing the power ⅓
U r right. Thx for pointing
Thank you very much
Thank you very much
done
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You can also do the second part like this:
a³ + 3a - 4 = 0
Sub a = 1,
1³+ 3(1) - 4 = 1 + 3 - 4 = 0
By the factor theorem, a - 1 is a factor of the polynomial.
Factorise,
(a-1)(a²+a+4) = 0
You will be able to obtain the second bracket by some trial and error once you know (a-1) is a factor.
Continue accordingly.
a³ + 3a - 4 = 0
Sub a = 1,
1³+ 3(1) - 4 = 1 + 3 - 4 = 0
By the factor theorem, a - 1 is a factor of the polynomial.
Factorise,
(a-1)(a²+a+4) = 0
You will be able to obtain the second bracket by some trial and error once you know (a-1) is a factor.
Continue accordingly.
Date Posted:
1 year ago
done
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clear
{{ downvoteCount * -1 }} Downvotes
You can choose to bring one of the surd to the left first as well.
Date Posted:
1 year ago
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