Plz ! only other question has plus requriements. explain how you can prove the difference of two cubes identity.
a3 – b3 = (a – b)(a2 + ab + b2)

Using d, e, and f as values on a triangle and d being 60 degrees, what is the value of e and f if d is 60 degrees? also, what do you notice about the values of e and f?

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.