# Hard SAT Math Question 34 — Video Explanation | 1600.now

Source: https://1600.now/hard/34

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34

If $c$ is a constant greater than or equal to $2$, $x^2 + y^2 = 5c$, and $xy = 5$, what is $(x+y)^2$ in terms of $c$?

A

$2c + 5$

B

$2c + 10$

C

$4c + 5$

D

$5c + 10$