Question

What is the coefficient of the second term of the trinomial? (3x 3)2=9x2 Bx 9 Enter your answer in the box. B =.

Answer 1

B= 18x

Explanation:

use identity : (a+b)² = a²+2ab+b² you have a =3x and b =3 so: B =2ab

the second term of this trinomial is : 2ab means : 2(3x)(3) = 18x

(3x +3)2=9x2+2(3x)(3)+3²