Question

Please tell the answer of the question 7 and 8 which are ticked

please​

Answer 1

Answer:

0 answer

Step-by-step explanation:

If A = 7x^2 + 5xy - 9y^2

B = -4x^2 + xy + 5y^2

C = 4y^2 - 3x^2 - 6xy

A + B + Y = 0

So, we arrange these equations

A = 7x^2 -9y^2 + 5xy

B = -4x^2 + 5y^2 + xy

C = -3x^2 + 4y^2 - 6xy

then add them all equations

7x^2 - 9y^2 + 5xy - 4x^2 + 5y^2 + xy - 3x^2 + 4y^2 - 6xy

7x^2 - 9y^2 + 5xy - 7x^2 + 9y^2 - 5xy

at last cut them

and we will get answer is 0

Answer 2

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