3 years ago

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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