tolong dijawab yaa... 1.7(X+9) 2.6(9+X) 3.(X+6) (2X+1) 4.(X+5) (X+7) 5.(4X-1) (X-2) 6.(8-X) (6X-2)

1. 7(x+9) = 7x + 63

2. 6(9+x) = 54+6x => 6x+54

3. (x+6)(2x+1) = 2x^2+x+12x+6
= 2x^2+13x+6

4. (x+5)(x+7) = x^2+7x+5x+35
= x^2+12x+35

5. (4x-1)(x-2) = 4x^2-8x-x+2
= 4x^2-9x+2

6. (8-x)(6x-2) = 48x-16-6x^2+2x
= -6x^2+48x+2x-16
= -6x^2+50x-16