Question

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What should be subtracted from 2x - 3x2y + 2xy2 + 3y to get x - 2xy + 3xy2 + 4yº?
[HOTS, NCERT Exemplar]​

Answer 1

Answer:

2xy - xy² - y + 2x - 3x²y

Step-by-step explanation:

Let the unknown number to be subtracted be 'a'

(2x - 3x²y + 2xy² + 3y) - a = -2xy + 3xy² + 4y

-a = (-2xy + 3xy² + 4y) - (2x - 3x²y + 2xy² + 3y)

-a = -2xy + 3xy² + 4y - 2x + 3x²y - 2xy² - 3y

-a = -2xy + 3xy² - 2xy² + 4y - 3y -2x + 3x²y

-a = -2xy + xy² + y - 2x + 3x²y

a = 2xy - xy² - y + 2x - 3x²y