Solve x2 – 2x – 15 = 0 using the zero product property.

a. x = –3, –4
b. x = –5, 3
c. x = 5, –3
d. x = 7, –1

How to do this , and can some one explain

Find the value of x for which line a is parallel to line b

Asalesperson has january sales of $20,000(1,$20,000) and april sales of $80,000 (4,$80,000). what is the rate of change?