1. 1.
2. 2. 6
3. 3.
4. 4. + +
5. 5.
6. 6. ...
7. 7.
8. 8. 4x2+6x
9. 9. :- 4. ,,, (a2 + b2 )2 18(a2 + b2 ) 88 (a2 + 7a)2 8(a2 + 7a) 180 x2 + (3a + 4b)x + (2a2 + 5ab + 3b2 ) x2 x (a + 1)(a + 2)
10. 10. ()(x2 x)2 + 3(x2 x) 40 () 6x2 x 15
11. 11. y2 y (b + 1)(b + 2) 27x2+15x+2
12. 12. (a2 + b2 )2 18(a2 + b2 ) 88 (a2 + 7a)2 8(a2 + 7a) 180 x2 + (3a + 4b)x + (2a2 + 5ab + 3b2 ) x2 x (a + 1)(a + 2)
13. 13.