Question

Tolong ya bsk dikumpulkan , pusing nih

Answer 1

1. 2x + 3y - 4x - 5y = 2x - 4x + 3y - 5y = -2x - 2y = 2(-x - y)
2. 9x^2 + 7x^3 - 8x^2 - 5x^3 = 9x^2 - 8x^2 + 7x^3 - 5x^3 = x^2 - x^3
3. 7a(1+b) - 3b(1+a) = 7a + 7ab - 3b + 3ab = 7a- 3b + 7ab + 3ab = 7a - 3b + 10 ab
4. -
5. 3/x+1 + 3/x-1 = 3x-3/x^2-1+ 3x+3/x^2-1 = 3x-3+3x+3/x^2-1
                                                               = 6x/x^2 - 1

(cat : sombol "^" dibaca pangkat) nomer 10 ndak bisa aq