Question

I wish I can give out more points but I'm lacking on points myself, so sorry! thank you for anyone who puts their time into helping me :-D (even answering one of the three questions are a big help for me!)

Answer 1

Well I'm still trying to solve the first question so I'll tell you the other answers
the answer for the second question is :
${4x}^{2} + 20x$
and for the third question :
$\frac{7}{8}$