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bagirrra123 [75]
3 years ago
12

(y* - 5)(yx + 5) please help

Mathematics
1 answer:
Nina [5.8K]3 years ago
7 0

Answer:

Simplified the expression.

y2x+5y−5yx−25  

I think this is what were were asking, if not please explain better.

Hope this helps :D

plz like & brainly

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What is the coefficient of the third term in the binomial expansion of (a + b)6? 1 15 20 90
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Answer:  15

Step-by-step explanation:

(r+1)th term of (a+b)^n is given by:-

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T_3=T_{2+1}=\ ^6C_2(a)^{6-2}(b)^2\\\\

=\ \dfrac{6!}{4!2!}a^4b^2\ \ \ [^nC_r=\dfrac{n!}{r!(n-r)!}]\\\\=\dfrac{6\times5\times4!}{4!\times2}a^4b^2\\\\=3\times5a^4b^2\\\\ =15a^4b^2

Hence, the coefficient of the third term in the binomial expansion of  (a+b)^6 is 15.

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