Can’t even lie i’ve been struggling with this for a month now

Find the quotient. 50a2 – 98b2 -5a +7b

Plz answer asap! i will reward brainliest and 12 points for these three questions!take notice: these three questions are completely different! 1) what is the percentage of sugar in the syrup made of 10 kg of water and 4 kg of suugar? 2) what was the original price if after 10% discount it became $450? 3) at first a price was decreased by 12%, then it was disounted again by an additional 5%. what is the percent of the total discount? , and remeber i will award brainliest and 12 points!

Graph each quadratic function and identify its key characteristics. f(x) = x^2 - 2x - 3