Question

7 x square y square - 5 x y​

Answer 1

Answer:

qeajsbsvs. sys Feb sysbdgs sys

Answer 2

Answer:

if a is equal to 7 x square + 5 xy minus 9 y square and b is equal to minus 4 x square + xy + 5 y square and C is equal to 4 y square - 3 x square - 6 xy then show that a + b + C is equal to zero