The value of B from the given expression is 18
Trinomials and expansion
Given the expression:
(3x+3)^2
Expand the given expression
(3x+3)^2 = (3x+3)(3x+3)
(3x+3)^2 = 9x^2 + 9x + 9x + 9
(3x+3)^2 = 9x^2 + 18x + 9
Compare with 9x^2+Bx+9
9x^2 + 18x + 9 = 9x^2+Bx+9
18x = Bx
B = 18
Hence the value of B is 18
Learn more on trinomial here: https://brainly.com/question/1538726
