URGENT... I Can't solve these problems... PLEASE HELP!!!?

Question

( ^ = the power of )

8. Multiply: (3x + 3y)^2 (2x + 3y)

9. Divide: (2x^3 - x^2 + 3x -1) ÷ (x + 2)

10.Multiply: (2s + 5z)^2 (s + 3z)^2

For questions 11-13, factor the algebraic expressions completely.

11. 6x^2 - 28x + 16

12. x^4 + 2x^3 - 3x - 6

13. x^8 - 1

For questions 16-20, classify the given numbers as real and rational, real and irrational, or complex.

16. v*16 (root of 16)

17. -7i

18. 1/9

19. π (pie)

20. i^2

Answer 1

I dislike my homework enough that I don't want to do yours too.

See the link below for a site that might help

Answer 2

i'll being one of the questions for u

8. Multiply: (3x + 3y)^2 (2x + 3y)

step 1: expand everything
(3x + 3y)^2 (2x + 3y) = (9x^2 + 18xy + 9y^2)(2x+3y)
= 2x(9x^2+18xy+9y^2)+3y(9x^2 + 18xy + 9y^2) now all u do is expand yet again and colect common factors.

for questions 11 general form is

ax^2 +/-bx +/- c

now wat u need to do is find two numbers when MULTIPLIED together gives u (ac)AND added together gives u b

eg

x^2 + 4x + 3

so a = 1 b = 4 and c = 3

so u can have the numbers(in this case cause its an easy one) 1 and 3

u then have
x^2 + 1x+3x + 3
then u can factorise by pairs

(x^2 + 1x)+(3x + 3)
=x(x+1)+3(x+1)
u can simplify this further by:
=(x+3)(x+1) u can check to see if hte answer is right by expanding it again. now do 11 the same way. for twelve you can use facortisation of polynomials but i dont think u may have learnt that yet so forget about that

definitions

a rational number is one that can be expressed as a WHOLE number when square rooted(im pretty sure of that one but ring up some friends to make sure)
a irrational is the opposite of a rational number one that has decimal points that kinda go on and on and on (hint hint)

well i hope that helps and DO UR HOMEWORK AND LISTENIN CLASS NEXT TIME lol. dw this stuff u'll be able to pick up with some work. hope it helps!

Answer 3

Looks like u are a very lazy person making others do your home work.
Any way i will give u the final answers to some of them. U work it out.
8.18x^3_72xy^2+63x^2y+27y^3
10. 4s^3+34s^3z+61s^2z^2+60s^2z+240sz^3+225z^3
11.x=4, x=2/3
12. x3=3
13. x=1^1/8

Answer 4

Do your best, and if you want to do better then work at it.

PS One question at a time might get answered, but a shedload of someone else's homework??????

And, by the way (Q19), "pie" is apple or blueberry, you meant "pi", the Greek letter used to symbolise the ratio of a circle's circumference to its diameter.

Answer 5

I will help you with the last five. Am too lazy to do the rest.
Here you go:

16. real and rational
17. complex
18. real and rational
19. real and irrational
20. real and rational

Answer 6

one sec
8. (9x^2+18xy+9y^2) (2x+3y)
18x^3+27yx^2+36yx^2+54xy^2+27y^3=
18x^3+63yx^3+72xy^3+27y^3
10. (4s^2+20sz+10z^2) (s^2+6sz+9z^2)
4s^4+24zs^2+36s^2z^2+20s^2z+120s^2z^2+180sz^3+10z^2s+60sz^3+90z^4
i'm sure you can work it from here.

Answer 7

from Wikipedia, it is going to be a common distribution with recommend ok and std dev sqrt(2k). see wikipedia "if X ~ ?²(ok), then as ok has a tendency to infinity, the distribution of (X-ok)/sqrt(2k) has a tendency to a in many cases used established distribution".

Answer 8

Easy one

the answer is--------13 cuz there aint no bones in ice cream

Answer 9

the time you wasted typing all those questions is enough to finish ya homework.

Answer 10

SOMEBODY GONNA GET A HURT REAAAAL BAAAD!!!

Tsk tsk tsk ... now why didn't you do your homework in time????

Stop wasting your time online and DO IT NOW!

Toodles