Question

(x + 6y − 2z) − (x − 5y + 3z)

Answer 1

any ideas?

Answer 2

hello?

Answer 3

Simplify the expression

Answer 4

like terms and substitution i think!

Answer 5

Yes, "like" terms will be used...

Answer 6

Do you know the definition of subtraction?

Answer 7

to take away!

Answer 8

Yes, that is in arithmetic way of thinking about it, but in elementary algebra it is defined as adding the opposite.

Answer 9

okay!

Answer 10

so like terms are added or subtracted?

Answer 11

They are added, but their opposite is added, which makes it subtraction, right?

Answer 12

yes i think! i came up with this answer X^2+y-z

Answer 13

$$a-b=a+(-b)$$ Have you seen this before? To subtract b add the opposite of b.

Answer 14

so -b+-b?