Question

what should be taken away from (3x²-4y²+2) to obtain (-x²+y²) ​

Answer 1

Answer:

Hence, we have to y(x) = 4x² – 3y² - xy taken away from f(x) = 3x² – 4y² + 5xy + 20 to get g(x) = – x² – y² + 6xy+ 20

Answer 2

Let the number to be subtracted be = a

(3x²- 4y² + 2) - a = (-x²+y²)

3x²- 4y² + 2 - (- x² + y²) = a

3x²- 4y² + 2 + x² - y² = a

3x² + x² - 4y² - y² + 2 = a

4x² - 5y² + 2 = a

The number is 4x² - 5y² + 2