Question

If (x²y + y² + 3) is subtracted from (3x²y + y² + 5) then coefficient of y in the result is?

Answer 1

If (x2y + y2 + 3) is subtracted from (3x2y + 2y2 + 5), then coefficient of y in the result is 2x2. (x2y + y2 + 3) is subtracted from (3x2y + 2y2 + 5) = (3x2y + 2y2 + 5) – (x2y + y2 + 3) = 3x2y + 2y2 + 5 – x2y – y2 – 3 = (3x2y – x2y) + (2y2 – y2) + (5 – 3) = 2x2y + y2 + 2