Posted by Anonymous on .
Add (5x^2  2x + 9) + (2x^2  4).
My answer: 7x^4  2x + 5 or 7x^2  2x + 5?

Algebra 1 
Reiny,
Your question was answered , go back and check

Algebra 1 
PsyDAG,
The latter. Exponents are added when multiplying terms.

Algebra 1 
Anonymous,
I am confused. Steve said the correct answer is 7x^4  2x + 5.

Algebra 1 
Reiny,
5x^2 + 2x^2 = 7x^2
(5 apples + 2 apples = 7 apples)
Steve had a typo, happens even to the best of us