Salut !
A = 2y² - y(4y-7) = 2y² - 4y² +7y = -2y² + 7y = y(-2y+7)
B = (2t-6)+5(2t-6)² = (1)(2t-6)+5(2t-6)(2t-6)
= (2t-6)[1+5(2t-6)]
= (2t-6)(10t-29)
C = 121-(x-9)² = 11² - (x-9)² = [11+(x-9)][11-(x-9)]
= (x+2) (20-x)
D = (7p-2)(2-3p)+(4p+3)(7p-2)
= (7p-2)[(2-3p)+(4p+3)]
= (7p-2)(p+5)