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You need to distribute through to simplify. What do you not understand?
all of it im new at this i get confused on were to stsrt
Ok. Well when you multiply variables the format is as follows. Let * be multiplication. \[x*x=x^2\] and \[x*x*x=x^3\] and so on.
So maybe it's easier to work through the problem, or just spit out the answer like what has been done already.
cyter how did you come up with that . if that is the answer fine but that dose not tell me how to do it
yes i would like to work through it step by step please so i can under stand it better
Ok so the first part you have -4y(3y). The parenthesis just separate quantities and mean to multiple. So -4 times 3 give -12 and y times y gives y². Thus you get -12y² for the first part. Does this make sense?
Multiply* not multiple.
sorry thats wrong -4(3y)-5+2(5y+7) this is the correct one
Ok well you do the same process. So -4(3y) gives -12y. All I did was multiple what is in parenthesis by -4. Then you subtract 5 giving you -12y-5+2(5y+7). To simplify the 2(5y+7) you multiply what's in parenthesis by what is right outside the parenthesis. So 2 times (5y+7). So what does 2(5y+7) equal when you multiply it out?
Not quite. 2(5y+7)=10y+14. You multiply each thing in the parenthesis by 2.
So once we have simplified all parts we get: -12y-5+10y+14. The last step is to add things that look alike.
You are correct above. But you can't forget the y. The y is a variable and the 5 is a coefficient. When you multiply variables by a number you just get that many variables. So 3 times y gives 3y, 7 times x gives 7x.
-12y+10y +14==12y ?
Ok so not sure if you were understanding how we got to -12y-5+10y+14 but if we do continue when I say add like terms I mean add any regular numbers so like -5 and 14 to get 9 and add any variables that look the same. -12y and 10y look the same. Both have a y and both have coefficients. So -12y+10y=-2y I added the -12 and 10 and just kept the y. Final answer should be -2y+9
ok can we try another one
Now remember what I said. The number in front of the parenthesis is multiplied to each term inside the parenthesis and if there is a variable, b for example, do not leave it off.
okdo i start with 4*-3 or 2*6b or dose it matter
You can start wherever you like. I normally work from the left to the right so I don't forget anything :)
Close. Don't forget the negative sign. So -12b
should it look like that
or it should be a -2 at the end
Should be a -2 at the end and don't forget the -10 at the beginning. So after simplifying a little you get -10-12b+12+12b-2
now we add the like #first
Yes now you add the like terms.
You have -12b+12b so you have a negative 12b plus a positive 12b what does that give you? Not -24b.
Nope. If you have 12 of something and then take away 12 of something you are left with zero. -12b+12b=0
rewrite ok so the answer is 0
one more ok
no no oh -5*1=-4
-5 x -1 = 5
i thought that was how it went wrong rule i gess
Uh maybe you meant -5+1=-4 that's correct :)
-5*2=-10 A negative number times a positive number is a negative number. A negative number times a negative number is a positive number.
should it read -14+-7+6x+6+16 i hope!!
i for got the perentacies around the -7 because of the two signs together
I get 5x-10-8x-6x-6
Forgot the +16 on the end. So 5x-10x-8x-6x-6+16
so were did i go wrong
doesn't (-x) mean 1
Mean 1, no. There is a 1 coefficient in front of the x. So -x is the same as -1x.
so wouldn't that be 8*-1x=-7
No. You are multiplying, not adding. 8*(-1x)=-8x if you cannot add these terms since they aren't "like" terms.
I'm going to go. But I will leave you with the work for the problem and maybe from what we've discussed you can figure it out.
ok i told you im confused haha
i hope so thanks for your help
-5(-x+2)+8(-x)+3(-2x-2)+16 5x-10-8x-6x-6+16 here I just multiplied through -9x+0 here I added like terms (added the numbers with the x's by themselves to get -9x and then the numbers by themselves to get -10-6+16=0