If 5x – 2y = 7 and xy = 2, find the value of (5x + 2y)?
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GIVEN,
- 5x – 2y = 7
- xy = 2,
TO FIND : value of (5x + 2y)²
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- (5x + 2y)²
= (5x -2y)² + 4 . 5x. 2y
= 7² + 40 . 2
= 49 + 80
= 129 ✓
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