Tolongggg plissssss………………

1. (2x – 5)(x – 2)
= 2x² – 4x – 5x + 10
= 2x² – 9x + 10
2. (3p – 7)(3p + 7)
=9p² + 21p – 21p – 49
= 9p² – 49
a = 9
b = 0
c = -49
maka a + b + c = 9 + 0 – 49
= -40