Question

please help me solve all 4​

Answer 1

Step-by-step explanation:

1. Suitable identity is (x+a)(x+b)=x
2. 2
3. +(a+b)x+ab
4. (x+8)(x−10)=x
5. 2
6. +,(8−10)x+(8×−10)
7. x
8. 2
9. +(−2)x+(−80)
10. x
11. 2
12. −2x−80
13. (3a+2b)
14. 3
16. Using (a+b)
17. 3
18. =a
19. 3
20. +b
21. 3
22. +3ab(a+b)
23. =(3a)
24. 3
25. +(2b)
26. 3
27. +3(3a2b)(3a+2b)
28. =27a
29. 3
30. +8b
31. 3
32. +18ab(3a+2b)
33. =27a
34. 3
35. +8b
36. 3
37. +57a
38. 2
39. b+36ab
40. 2

Answer 2

Answer:

a. =. x2+10+8x+80

b. =. use the formula of (a+b)3 = a2 + b2 + 2ab + a2 + b2