Simplifying

[InNeedOfHelp!]

Hi, newbie here. I have never been one to often ask for help, but I have a major deadline coming up, and a lot of questions I just can't figure out! Any help would be greatly appreciated.

The first of my problems are as follows.

Simplify:
40. (x+4)(x+1)
41. (2y-7)(4y+4)
42. (4^2+2y^2)(2x^2-y^2)
43. (z+2)^2
44. (2m-3n)(2m+3n)
45. (x+3)(x^2-2x+4)
^ indicates power. I have literally stared at these problems for hours, and even run them through a couple of different solving programs, but the answers keep coming back the same as the question. So what I'm asking is, can these be simplified, and if yes, how?

EDIT

Also, how do I simplify 5hk^2(2h^2k-hk^3+4h^2k^2) ?

 

[stapel]

can these be simplified, and if yes, how?

To simplify a product, multiply it out. For instance:

. . . . .(5)(3) = 15

. . . . .3(x + 2) = 3x + 6

. . . . .(x + 1)(x - 4) = x² + 1x - 4x - 4 = x² - 3x - 4

...and so forth.

If you're not familiar with how to multiply polynomials, try here:

. . . . .FreeMathHelp lesson: Multiplying Polynomials

Eliz.

 

[tbryant]

The first one would be
x(squared) +5x +14