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if x^2 + y^2 = 4 (x+y-2),then value of (x+y)^2 is (A) 4 (B) 0 (C) 16 (D) 20

if x^2 + y^2 = 4 (x+y-2),then value of (x+y)^2 is



(A) 4    (B) 0    (C) 16  (D) 20

Grade:12

1 Answers

piyush garg
9 Points
12 years ago

x^2+y^2=4x+4y-8 this represents apoint circle whose radius is zero and centre is (2,2)

(x-2)^2 +(y-2)^2=0 hence it represents apoint x=2 and y=2 therefore (x+y)^2 is (2+2)^2 =16 ans

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