Question

What should be added to 4x² - 6xy + 7y² to get x²-xy - 2y² ?​

Answer 1

Answer:

x²+2xy-y² should be added to x²+xy+y² to obtain 2x²+3xy

Step-by-step explanation:

Let A = x²+xy+y²,

B = 2x²+3xy ,

Let m should be added to A to obtain B

Now ,

m + A = B

=> m = B - A

=> m = (2x²+3xy) - (x²+xy+y²)

= 2x²+3xy-x²-xy-y²

= 2x²-x²+3xy-xy-y²

= x²+2xy-y²

Therefore,

m = x²+2xy-y²

Answer 2

Step-by-step explanation:

hope this will help you. the sign change in subtract. please mark me as brainlist