If $$\(x+y=25\)$$ and $$\(x^{2}-y^{2}=50\)$$ What is the value of $$\(x y\)$$ ?
A.
150.25
B.
155.25
C.
175
D.
1250
Exam No：2016 First Round Grades 10-12 Year：2016 Question No：3
Answer:
B
Knowledge points:
G10-12 - Algebra - Systems of Linear Equations (Manipulation & Modeling)
Solution:
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