3 years ago

The length of the rope is 13 m, out of which 9 m of the rope is used for fixing

Mathematics

2 answers:

Ksivusya [100]3 years ago

8 0

Answer:

Step-by-step explanation:

Should subtract

ZanzabumX [31]3 years ago

4 0

Answer:

Step-by-step explanation:

length of remaining rope= 13-9

= 4m

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Step-by-step explanation:

* Lets explain how to solve the problem

- The rule of expand the binomial is:

$(a+b)^{n}=(a)^{n}+nC1(a)^{n-1}(b)+nC2(a)^{n-2}(b)^{2}+nC3(a)^{n-3}(b)^{3}+...............+(b)^{5}$

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∴ a = 10k , b = -m and n = 5

∴ $(10k-m)^{5}=(10k)^{5}+5C1(10k)^{4}(-m)+5C2(10k)^{3}(-m)^{2}+5C3(10k)^{2}(-m)^{3}+5C4(10k)^{1} (-m)^{4}+5C5(10k)^{0}(-m)^{5}$

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∵ 5C2 = 10

∵ 5C3 = 10

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