Between lines two and three of the solution, we rearranged the terms to group 2x2 and -14x and then grouped -3x and 21. What would happen
if we grouped 2x2 and -3x and then grouped -14x and 21?
2x²-17x+21
= 2x²+x+px+21
2x² + (-3)x+ (-14)x+21
(2x²-3x) + (-14x+21)
= x(2x-3)+(-7)(2x-3)
= (x-7)(2x-3)
=
=
Compare and contrast the methods.