Answer
$21x^{2}+25x-4$
Work Step by Step
To find the product of $(7x-1)$ and $(3x+4)$, we need to use the distributive property in which each term of the first polynomial is multiplied to each term of the second polynomial:
$(7x-1)(3x+4)$
=$7x(3x+4)-1(3x+4)$
=$21x^{2}+28x-3x-4$
=$21x^{2}+25x-4$
