Respuesta :

Answer:

For (2x-3)(x-7):    2x²-17x+21

For (2x-3)(x+7):   2x²+11x-21

For (2x+3)(x-7):   2x²-11x-21

For (2x+3)(x+7):   2x²+17x+21

PLESASE PAY ATTENTION TO THE SYMBOLS