If $A = 2 y^{2} + 3 x - x^{2}, B = 3 x^{2} - y^{2}$ and $C = 5 x^{2} - 3 x y$ then find
$B + C$

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Solution

$B = 3 x^{2} - y^{2}; C = 5 x^{2} - 3 x y$

$B + C = 3 x^{2} - y^{2} + 5 x^{2} - 3 x y$ $= 8 x^{2} - y^{2} - 3 x y$

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Let A = 3 y^{2} + 9 x - 3 x^{2}, B = 6 x^{2} - 2 y^{2} + 3 x, C = 9 x^{2} - 3 x y - y^{2} . Find A + B - C.

Let A = 3 y^{2} + 9 x - 3 x^{2}, B = 6 x^{2} - 2 y^{2} + 3 x, C = 9 x^{2} - 3 x y - y^{2} . Find A + B - C.

A = 5 x^{2} + 3 x^{2} - 4 x + 1, B = 3 x^{3} + 5 x^{2} + 3 x - 8

C = 6 x^{3} - 4 x^{2} - 7 x + 3

(A + B) = C

A = 3 x^{2} - 4 x + 1, B = 5 x^{2} + 3 x - 8

C = 4 x^{2} - 7 x + 3

3 x^{2} + 2^{2}, - x^{2} - 4 y^{2} + 4 x y

6 x y + 2 x^{2} - 3 y^{2}

- 5 x^{2} + 2 y^{2} - 3 x y

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