Answer
$-8x^2-8x+48$.
Work Step by Step
The given expression is
$=(8-4x)(2x+6)$
Use the FOIL method.
$=8(2x)+8(6)-4x(2x)-4x(6)$
Multiply.
$=16x+48-8x^2-24x$
Combine like terms.
$=48-8x^2-8x$
Standard form.
$=-8x^2-8x+48$
Hence, the product is $-8x^2-8x+48$.