Question

What must be on the blank to make statement true.. (3x+_)(xx-4)=3x²-11x-4?

A.1
B.-b
C.13
D. - 13

Pls help me​

Answer 1

(3x+4)(x-4) is your answer

Explanation:

3x²-11x-4

=3x²-12x+x-4

=3x(x-4)+1(x-4)

=(x-4)(3x+4)