Expert: Richard J. Raridon - 6/11/2009

Question
19. Simplify:
(9 - 5t)(5t - 9)

 
20. Simplify:
(p^2 - 2q^2)(p^2 + 2q^2)

 
21. Simplify:
(2z^2 - 5)^2

 
22. Simplify:
x^2(x - 3)(x + 3)

 
23. Simplify:
(t - 3)(2t^2 - t + 2)

 
24. Simplify:
(3 - k^2)(2 - k^2 - k^4)


25. Simplify:
(y^2 - 2y + 1)(y^2 + y +1)

 
26. Simplify:
(x^2n - y^n)^2

 
27. Simplify:
(x^n + 1)(x^n - 1)

28. Simplify:
(a + b)^2

 
29. Simplify:
(a - b)(a^2 + ab + b^2)

30. Simplify:
(x2 - 4x + 8)(x2 + 4x + 8)  

Answer
You need to learn to multiply
19. -25t^2+90t-81
20. p^4 -4q^4
21. that's already simplified
22. x^4 -9x^2
23. 2t^3-7t^2+5t-6
24. k^6-2k^4-5k^2+6
25. y^4-y^3-y+1
26. already simplified
27. x^2n -1
28. already simplified
29. a^3-b^3
30. x^4+64