If x = sin θ + cos θ and y = sin θ – cos θ, then the value of (x2 + y2 - 1) × (x2 + y2 + 5) will be

If x = sin θ + cos θ and y = sin θ – cos θ, then the value of (x² + y² - 1) × (x² + y² + 5) will be
1). 6
2). 9
3). 7
4). 10

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