Question

Morning peeps, morning here anyway. Am I starting out right on this one: (7-2y)(10-3y), 7(10)+7(-3y)-2y(10)-2y(-3y)? ty for anyone that is available to help me;) Denise

Answer 1

What is the original question?

Answer 2

Morning is peeping here, too.

Answer 3

sorry, it is the (7-2y)(10-3y)

Answer 4

LOL:) peeping, yep, but still dark;)

Answer 5

Bright sunshine here but morning.

Answer 6

the directions say to Express the product in descending powers of the variable. It first says to use the FOIL method.

Answer 7

nice, where are you? I am in Oregon:)

Answer 8

foil right

Answer 9

(7-2y)(10-3y) = 6y^2-41y+70
FOIL then combine likes.

Answer 10

@nwcountry --> I am in southeastern U.S. I have a friend in Portland.

Answer 11

and yes, you are exacty right, although you now have some more work to do

Answer 12

@ NW Country --> what answer did you get for the problem.

Answer 13

Oh love the South, yes, ok, if I have started out right I should end up ok on the prob. much thanks and have a great day! PS I may be back, LOL!! denise

Answer 14

Let's work it. These interlopers always show up.

Answer 15

thanks Luis:) Direct, I think it was 54y-6y but I erased it so can hardly see it, just didn't look right.

Answer 16

FOIL, First, Outer, Inner, and Last terms, correct?

Answer 17

Thank you too Satellite!!

Answer 18

it is a little confusing(ok, a lot, the FOIL thing. I just do the distribution method but I suspect I am missing something:( So much to learn in such a short time, they cram a lot in at the college.

Answer 19

Let's begin anew.

( 7 - 2y)( 10 - 3y)

7*10 + 7* (-3y) + (-2y) (10) + (-2y)(-3y)

See if you think that's correct. I can draw the FOIL multiplications if you like.

Answer 20

thank you too agreene!!

Answer 21

Ok direct;) I'm checkin it out now:)

Answer 22

that's the way I did it, same deal. Ok, let me finish it and see what I get this time;)

Answer 23

So, that would be 70 - 41y + 6y^2

Answer 24

Yes, I didn't have it at first because I forgot to take out the + sign after 70, but thanks for your answer, doubt I would have seen it, not for a time anyway, LOL!!

Answer 25

Try this: (x + 2) * (x + 2) =

Answer 26

One more question. Why would they put the answer in the opposite order in the back of the book? Am I missing something in the original directions about descending order? I saw only one answer to one of the odd numbered questions(we work the even numbers so we can't just copy the answers. But the odd numbered help us to know if we are on track. Hope I am making sense.

Answer 27

Yes, that helps me when I remember I need to distribute and multiply, thank you:)

Answer 28

It is typical practice to place the terms in descending order.
70 - 41y + 6y^2 = 6 y^2 - 41y + 70

Answer 29

Try this: (x + 2) * (x + 2) =

Answer 30

Here's one, I think I got it right:) (7x^2-2)(3x^2-5), I got 21x^4 -41x^2 - 10

Answer 31

I got that except for a + 10. Let me check my work.

Answer 32

Ohhhhhhhhhhhhh, I need to do that according to direction then. I have the answer but then put it in descending, got it, ty much!!!!
Ok, on the last problem you are checking

Answer 33

I think you are right!

Answer 34

(-2)(-5) = + 10. It is so easy to make a sign-us error.

Answer 35

Do you not want to do (x + 2) * (x + 2) =

Answer 36

I remember it's multiply so I don't usually put that in. Do you think it's a better way I should write the problem?

Answer 37

it is my biggest problem, sign errors

Answer 38

I'll do them that way and see if it helps, I'm sure it will:)

Answer 39

I do it because of typing (keyboarding) here. I don't do it if I'm writing on paper. Sign errors are problems for everyone.

Answer 40

;) ty for your help, I really appreciate it.

Answer 41

Just do whatever technique you like. It's all the same thing.

(x +2)(x+2) Does that look more familiar?

Answer 42

yes but I understand the asterisk as well. Was that a +10? If so, I have another error in a problem I see. A minus, minus another minus = a +, I think?

Answer 43

hmm,on my calculator it comes out a minus 10?

Answer 44

This is the problem with the + 10 sinus problem: :) (7x^2-2)(3x^2-5), I got 21x^4 -41x^2 - 10. This answer is correct excecpt that it should be 21x^4 -41x^2+ 10.

Answer 45

what makes it a plus just so I understand Direct?

Answer 46

the two minuses?

Answer 47

I'll work it out.

(7x^2-2)(3x^2-5) =( 7x^2) (3x^2) + (7x^2) (-5) + (-2)((3x^2)) + (-2)(-5)

Answer 48

I don't use the FOIL technique so it takes me longer to figure out the multiplication.

Answer 49

Yes,, it is (-2)(-5) = 10

Answer 50

Ok, also, in descending order, would 10^4 come before say, 14^2?

Answer 51

No. Both are constant terms which means they are not variables.

Answer 52

Of x^2 and x, x^2 has the higher power and comes first. So, x^2 + x.

Answer 53

Yes, I see it on my calculator, you are right about the +10, ty, ty

Answer 54

Why do you not want to do the (x+2)(x+2) problem?

Answer 55

Variables go first then, but so 9x^4 would go before 10x^2?
It's in order, descending of just variables and what power?

Answer 56

Yes.

Answer 57

I didn't see it? You wanted me to work one out here?

Answer 58

Ok, got it, I have homework I have to finish by 9:45;)

Answer 59

Okay, so that's a no. When you have more time, we will practice.

Answer 60

I would love it, you are really kind, thank you and I will be back after about 1pm. I will look for you, Denise

Answer 61

Okay, have a good day.