Question

what should be added to 7 x square + 18 x y + Z square minus 7 to get X square + 10 x y - 2z square + 1

Answer 1

6Xsquare+8XY-3Zsquare-8

Answer 2

Let the no. to be added be x

7x square +18 xy + z square -7 +x = x square + 10 xy - 2z square +1

x = x square + 10 xy - 2z square +1 - 7x square - 18 xy - z square +7

x = -6x square - 8 xy - 3z square + 8 ANS