Posted by lisa on .
what is the sum of (x^23x+2) and (5x^23x8)?
how would you solve this???? please help

math 
JJ,
You have to combine like terms.
When you add you keep the variable(letter) with its exponent and and the coefficients (numbers in front)
3x + 5x = 8x
You are going to combine your x^2 terms
your x terms and your constants.
Show me your answer and I will check it. 
math 
lisa,
so would it be
7x^26?? 
math 
JJ,
3x 3x = 6x
this is the same as 3x + 3x + 6x
You are right, but missing the middle term.
3x + 3x = 0 that isn't what you had here. 
math 
lisa,
oh because i thought it was a negative and a positive so they cancel out
but its 7x^26x6? or...? 
math 
JJ,
Correct. You have to be careful with the signs.

math 
lisa,
Thank you c:

math 
JJ,
You are welcome.