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Are you familiar with like terms and unlike terms?
no not really
Like terms are those terms that have the same powers of variables, even though the coefficient (including the sign) may be different. For example, 2x^2 and -6.5x^2 are like terms.
When you have to add or subtract two expressions, you need to group together the like terms, because you can then add/subtract the coefficients among the like terms.
Are you following so far?
yes , i'm starting to get it
So what would be 4x^3 -2x^3?
would it be 2x^3
Correct. Just think of x^3 as apples, x^2 as oranges, so what would be 5x^3-3x^2+4x^3-x^2 ?
i think it would be x^2(9x−4) but i'm not sure
Yes, this is correct. 9x^3-4x^2 would have been totally acceptable as well. Good!
Are you familiar with the distributive property of multiplication?
Like 2(x+2) = 2x+4
yes i'm familiar with it
ok, now we can get to work on the problem. Can you simplify the expression by removing all parentheses? (-3y^2-8)-(-5y^2+1)
yeah i got this part, its 2y^2-9 , but i can't the other part of it which is y^2-?
2y^2-9 is the complete answer. Put a 2 in the box before the y^2, and put a 9 in the other box. I think the program is kind of babysitting us.
so the answer would look like this right, we get 2y^2-9
Exactly the same as yours.
woww thank you some much , for explaining it to me very well
You're welcome! :)