SAT Math Practice Question #25455 - SATify | SATify

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SAT Math Practice Question #25455 - SATify | SATify

#25455

algebra

completing the square

Calculus

medium

90 sec

Real numbers $x$ and $y$ satisfy the equation $x^{2} + y^{2} = 8 x - 4 y - 20$ . What is $x - y$ ?

A.

0

B.

2

C.

4

D.

6

E.

8