Solve x plus 3x equals 36

Itook a better photo of the question so y’all can see it i hope it’s a fine photo

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).

Rewrite the following quadratic functions in intercept or factored form. show your work. y = x^2 + 7x + 10