Question

What must be added to 7x² + 5y²_7z²to make
5x² – 7y² + 2z^2
make​

Answer 1

Answer:

$\huge\mathfrak\pink{Solution :-}$

$a + 7 {x}^{2} + 5 {y}^{2} - {7z}^{2} = 5 {x}^{2} - {7y}^{2} + 2 {z}^{2}$

$a + {7x}^{2} + {5y}^{2} - 7 {z}^{2} - 5 {x}^{2} + 7 {y}^{2} - 2 {z}^{2} = 0$

$a + 2 {x}^{2} + 12 {y}^{2} - 11 {z}^{2} = 0$

$a = - 2 {x}^{2} - 12 {y}^{2} - 11{z}^{2}$

Answer 2

Answer:

-2x^2-12y^2+9z^2

Step-by-step explanation:

Let the number = p

=> 7x^2 + 5y^2 - 7z^2 + p = 5x^2-7y^2+2z^2

=> p = 5x^2-7y^2+2z^2-7x^2-5y^2+7z^2

=> p = 5x^2-7x^2-7y^2-5y^2+2z^2+7z^2

=> p = -2x^2-12y^2+9z^2

I hope that it is helpful

Please make me brainliest