tolomg buat besok kak

2. a. (2x + 8)+(4x - 5 - 5y)
= 2x + 8 + 4x - 5 - 5y
= 6x - 5y + 3

b. (3p + q)+(-2p - 5q + 7)
= 3p + q -2p - 5q + 7
= p - 4q + 7

c. (3x² + 2x - 1) + (x² - 5x + 6)
= 3x² + 2x - 1 + x² - 5x + 6
= 4x² - 3x + 5

d. 2(x + 2y -xy)+ 5(2x - 3y + 5xy)
= 2x + 4y - 2xy + 10x - 15y + 25xy
= 12x - 11y + 23xy