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sveticcg [70]
3 years ago
7

Expand the binomial (a+2)^4

Mathematics
2 answers:
sp2606 [1]3 years ago
6 0

Answer: a^4+8a^3+24a^2+32a+16

Step-by-step explanation:

The binomial expansion of (a+b)^n=^nC_0a^nb^{0}+^nC_1a^{n-1}b^1+^nC_2a^{n-2}b^2+.........+^nC_na^0b^n

For (a+2)^4 , n=4 and b= 2 , we have

Then, the binomial expansion of (a+2)^4 will be :

(a+2)^4=^4C_0a^4(2)^{0}+^4C_1a^{4-1}2^1+^4C_2a^{4-2}2^2++^4C_3a^{4-3}2^3++^4C_4a^{0}2^4\\\\=(1)a^4+(4)a^3(2)+\dfrac{4!}{2!(4-2)!}a^2(4)+(4)a(8)+(1)(16)

∵ ^nC_0=^nC_n=0 and ^nC_1=^nC_{n-1}=n

=a^4+8a^3+(6)a^2(4)+32a+16\\\\=a^4+8a^3+24a^2+32a+16

Hence, the binomial expansion of (a+2)^4=a^4+8a^3+24a^2+32a+16

dimaraw [331]3 years ago
4 0

Answer:

Step-by-step explanation:

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