Question

x^2 + 5xy + 4y^2 = 55
x^2 + 7xy + 12y^2 = 99
solve for x and y​

Answer 1

Step-by-step explanation:

Example 1

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Add: 7xy + 5yz - 3zx, 4yz +9zx - 4y, - 3xz + 5x - 2xy.

Expressions are

7xy + 5yz - 3zx

4yz + 9zx - 4y

- 3xz + 5x - 2xy

We put like terms below like terms

7xy + 5yz - 3zx

+ 4yz + 9zx - 4y

-

3zx

- 2xy

5xy + 9yz +

+ 5x

3zx 4y + 5x

So, required sum = 5xy + 9yz + 3zx - 4y + 5x