Math, asked by SinisterChill, 1 year ago

Anyone know the answer

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Answered by Fawzan10

Given:
3x-7y = 10
xy = -1

(3x-7y)² = (3x)² + 2 * 3x * 7y + (7y)²

10² = 9x² + 42xy + 49y²

1000 = 9x² + 49y² + 42 * (-1)

9x² + 49y² = 1000 + 42

9x² + 49y² = 1042

Hope this helpz :)

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