Pls anwser these two question easy math

In the proof of the triangle angle sum theorem, you must draw an auxiliary line. which construction must you use to draw this line?

Assume that a population of 50 individuals has the following numbers of genotypes for a gene with two alleles, b and b: bb = 30, bb = 10, and bb = 10. calculate the frequencies of the two alleles in the population’s gene pool.

Solve the x in the equation x^2+14x+17=-96