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