Can you pls help me
Can you show your work too because I don't understand it

The factorization of 8x3 -125 is (2x-5)(jx2 +kx+25)

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Restrictions on f(x) = 1/x+5 and g(x) = x-2