2x because its 2 times the price of the book (x)
Answer:

Step-by-step explanation:
you use the distributive property to multiply these together
so its x times 5x plus x times -2 plus 1 times 5x plus 1 times -2
Answer:
Find the roots of x^2-13x+30=0 by solving for x
x= 10,3
Step-by-step explanation: