Question

What is the coefficient of the second term of the trinomial? (4a+5)2=16a2+Ba+25 Enter your answer in the box. B =

Answer 1

Answer:

$B=40$

Step-by-step explanation:

we know that

$(a+b)^{2}=a^{2}+2ab+b^{2}$

In this problem we have

$(4a+5)^{2}=16a^{2}+Ba+25$

The second term of the trinomial is equal to

$2(4a)(5)=40a$

therefore

$B=40$