Find all the solutions 1. 3x^2+2=-62
2.-5x^2-3=0

Please show the work, I would really appreciate the help

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).

Write the following as a base and exponent

Twelve less than a number is at most 20