Mohon dibantu,dan isi carany thx ya
1. (8a – 3b)(5b + 5a)
(8a + 5a)(5b – 3b)
13a + 2b (D)
2. -6x² – 7x + 11x² + 8x
-6x² + 11x² + 8x – 7x
5x² + x (A)
3. (7x – 3y)(6x – 8y)
(7x – 6x)(-8y + 3y)
x – (-5y)
x + 5y
4. (-6x² + 10x + 1) – (-9x² + 9x – 4)
-6x² + 9x² + 10x – 9x + 1 + 4
3x² + x + 5 (C)
semoga membantu