1.

. Which of the following arequadratic equations ? (i) x² - 6x-4 = 0(ii) 3x² - 7x-2=0(iii) x² - 6x²+2x-1=0(iv) 7x = 2x²(v) x² + 1 = 2 (x=0)Example 3. Which of the following ar​

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