The correct answer is d) (x-5)(21x+8)
To multiply the two expressions, you would first expand the expression (x-5/4x+8) to get x(12x^2+32x+16) - 5(12x^2+32x+16) and then simplify. This would result in (x-5)(21x+8).
multiply: x-5/4x+8 times (12x^2+32x+16)
a) (3x+2)/4(x-5)
b) (x-5)/(3x+2)/4
c) (x-5)(3x+2)
d) (x-5)(21x+8)
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