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If the equation 2x^2+4x y+7y^2-12 x-2y+t...

If the equation `2x^2+4x y+7y^2-12 x-2y+t=0,` where `t` is a parameter has exactly one real solution of the form `(x ,y)` , then the sum of `(x+y)` is equal to ______.

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CENGAGE ENGLISH-COMPLEX NUMBERS AND QUADRATIC EQUATIONS-All Questions
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  3. If the equation 2x^2+4x y+7y^2-12 x-2y+t=0, where t is a parameter has...

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  19. Find the complete set of values of a such that (x^2-x)//(1-a x) attain...

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