Question

Tolong dong bantuin kerjain ini.. ;) trimakasih

Answer 1

1.2x +3y-4x-5y
= 2x - 4x +3y - 5y
= - 2x -2y

2.9x kuadrat + 7x kubik - 8x kubik - 5x kubik
= 9x kuadrat - 8x kuadrat +7x kubik - 5x kubik
=x kuadrat + 2x kuadrat

3. 7a(1+b) - 3b (1+a)
 =7a + 7ab - 3b -3ab
=7a + 7ab - 3ab - 3b
=7a + 4ab -3b