For x = 5 and y = 3, the value of x2 + y2 - 2xy + 7 is :
11
169
71
1
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Given,
⇒ x2 + y2 - 2xy + 7
⇒ (x - y)2 + 7
Substituting values we get :
⇒ (5 - 3)2 + 7
⇒ 22 + 7
⇒ 4 + 7
⇒ 11.
Hence, Option 1 is the correct option.
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For x = 9 and y = 4, the value of x2 + 2xy + y2 - 3 is :
172
100
166