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Which of the following are quadratic ...

Which of the following are quadratic equations? `x^2+6x-4=0` (ii) `sqrt(3)x^2-2x+1/2=0` (iii) `x^2+1/(x^2)=5`

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RD SHARMA ENGLISH-QUADRATIC EQUATIONS-All Questions
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  3. Which of the following are quadratic equations? x^2+6x-4=0 (ii) sqr...

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  5. Which of the following are quadratic equations? 3x^2-5x+9=x^2-7x+3 ...

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