Question

If x is equal to minus 2 and X square + Y square + 3 X Y is equal to minus 5 then find y

Answer 1

Answer:

Step-by-step explanation:

Given;

x = -2

x² + y² + 3xy = -5

Putting the value of x in the given equation, we get

(-2)² + y² + 3(-2)y = 5

4 + y² - 6y = 5

y² - 6y = 1

y (y - 6) = 0

y - 6 = 0

y = 6

Answer 2

Concept Introduction: Polynomials are very special equations.

Given:

We have been Given:

$x = - 2$

${x}^{2} + {y}^{2} + 3xy = - 5$

To Find:

We have to Find: Find

$y$

Solution:

According to the problem, putting the value of

$x$

in the equation we get,

${( - 2)}^{2} + {y}^{2} + 3 \times ( - 2)y = - 5 \\ 4 + {y}^{2} - 6y = - 5 \\ {y}^{2} - 6y + 9 = 0 \\ {y}^{2} - 3y - 3y + 9 = 0 \\ y(y - 3) - 3(y - 3) = 0 \\ (y - 3)(y - 3) = 0$

therefore

$y = 3$

Final Answer: The value of

$y = 3$

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