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Most Important Selected Qs for JEE AdvancedMathematicsQuadratic Equation

For x, y R , if x^2-2 x y+2 y^2-6 y+9=0 then the value of (5 x-4 y) is equal to

Options

  1. A2
  2. B3
  3. C6
  4. D15

Correct answer

B. 3

Step-by-step solution

We have (x-y)^2+(y-3)^2=0 x = y =3

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