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makkiz [27]
3 years ago
15

Help pls, I’m confused

Mathematics
1 answer:
Alecsey [184]3 years ago
4 0

Answer:

(x + y)² = 25

Step-by-step explanation:

The expansion of (x + y)² is

(x + y)² = x² + y² + 2xy ← substitute x² + y² = 15 and xy = 5

           = 15 + 2(5)

           = 15 + 10

           = 25

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