2. Perform indicated operations?

1 ⤊

2. Perform indicated operations?

(3a-2xy) + (5xy - 7a)

2006-11-30 04:00:49 · 2 answers · asked by kris10 1 in Science & Mathematics ➔ Mathematics

2 answers

3a-7a= -4a
-2xy+5xy=3xy

therefore you get...

3xy-4a

2006-11-30 04:02:19 · answer #1 · answered by jennytkd13 3 · 1⤊ 0⤋

(3a-2xy) + (5xy - 7a) = 3a - 2xy + 5xy - 7a
pair the same with same:
= 3a - 7a - 2xy + 5xy subtract a-s with a-s and xy-s with xy-s
= -4a + 3xy
since a, b, c usually represent coefficients in the equation (e.g. ax+b), they should go to the end:
= 3xy - 4a

Done!

2006-11-30 14:45:19 · answer #2 · answered by Mirta G 2 · 0⤊ 0⤋