Question

What should be added 1+2x-3y to get y-x-1?
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Answer 1

Answer:

-x+3y-2

Step-by-step explanation:

Let 'a' be added

1+ 2x -3y+ a = x-1

2x-3y+a=x-2

a=x-2 -(2x-3y)

a=x-2-2x+3y

a= -x+3y-2

Answer 2

Answer:

4y - 3x - 2 should be added to (1 + 2x - 3y) to get (y - x - 1).

Step-by-step explanation:

Let the polynomial added to 1 + 2x - 3y be P(x,y).

According to the question,

(1 + 2x - 3y) + P(x,y) = (y - x - 1)      ---------------- (i)

P(x,y) = (y-x-1) - (1+2x-3y)

P(x,y) = y - x - 1 - 1 - 2x + 3y

P(x,y) = 4y - 3x - 2

Hence, the polynomial which should be added to 1 + 2x - 3y to get y - x - 1 is P(x,y) = 4y - 3x - 2.

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