Question

what must be added 2x2 -7xy +5y2 to obtain x2 +4xy -3y2 ?​

Answer 1

(2x2+4xy-3y2)-(2x2-7xy+5y2)

2x2+4xy-3y2-2x2+7xy-5y2

2x2-2x2+4xy+7xy-3y2-5y2

11xy-8y2 Answer

Answer 2

Step-by-step explanation:

let k will be added

2x^2-7xy+5y^2+k=x^2+4xy-3y^2

x^2+4xy-3y^2-(2x^2-7xy+5y^2)=k

k=x^2+4xy-3y^2-2x^2+7xy-5y^2

k= -x^2+11xy-8y^2