Math/Algebra
posted by Cindy .
Find each sum or difference
(3x^2 + 7x 2)+ (2x^2  3x + 4)
Answer: 5x^2 + 4x + 2
(4x + 8y) + (7y + 3x)
Answer: 7x+1y
(x^2 + 4x  1)+ (9x^2  8x + 9)
Answer: 10x^2  4x + 8
(8x + 6)  (2x  1)
Answer: 6x+ 11

all are correct, except the last one. How did you get 6+1 to equal 11?

I'm sorry my answer is 6x + 7 is this right???

please read my correct answer

correct.