Pythagorean theorem (picture provided)

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 5x^2 + 10x

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.

Meee i honestly dont know what this question talking about