combine like terms. (-3y^2 - 7y - 9) - (4y^2 + 6y + 9)

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- anonymous

combine like terms. (-3y^2 - 7y - 9) - (4y^2 + 6y + 9)

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- anonymous

again. say y^2 is apples and y are oranges.

- anonymous

-7y^2-y+0 or -7y^2-y

- anonymous

thank you both:)

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- anonymous

do you get how mitch got his answer?

- anonymous

-9-9 = -18 not 0

- anonymous

my bad

- anonymous

could it be -7y^2 + 13y + 18?

- anonymous

-7y^2-13y-18

- anonymous

watch ur signs :)

- anonymous

|dw:1347826413332:dw|
now add like terms

- anonymous

7y^2 + 13y + 18?

- anonymous

-7y^2-13y-18

- anonymous

ohhhh thank you:)

- anonymous

yeah, watch ur signs carefully next time ok? :)

- anonymous

Okay. Let me go through this one more time.
Like terms means exactly what they sound like. suppose you had 5 apples and 4 oranges,. Could you add 5 apples to 4 oranges and say you have 9 apples? No, because apples are not oranges.,
so when you have something like (-3y^2 - 7y - 9) - (4y^2 + 6y + 9) , this means that you can add the y^2 terms together because they are like terms.
Anyway, getting back to the problem.
Suppose y^2 is apples. and y is oranges.
(-3y^2 - 7y - 9) - (4y^2 + 6y + 9) means that you are subtracting 4 apples and 6 oranges and the number 9 from -3 apples and -7 oranges and the number -9.
When you subtract 4 apples from -3 apples, you end up with -7 apples.
when you subtract 6 oranges from -7 oranges, you end up with -13 oranges.,
subtracting 9 from -9 gives you -18.
This means that you have -7 apples and -13 oranges and the number -18.
In mathematical terms, this is -7y^2 -13y -18

- anonymous

okay sounds good! :)

- anonymous

|dw:1347826655400:dw|
no your not multipling you adding or subtracting exapmple
so if I was at negative 9 or minus 9 then took -9 more then I'd be at -18
hence why we get
-7y^2-13y-18

- anonymous

thank you @dhatraditya that helped :)

- anonymous

and same to you @kmalone99

- anonymous

@madisonmaruhnich94 : that's great. Always try to make those fancy x's and y's mean something that you can relate to.

- anonymous

remember like dhatradutya must be like terms, exactly alike and your welcome your sme age as one of my daughters.

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