यदि निम्नलिखित द्विघात समीकरणों के मूलों का अस्तित्व हो तो इन्हें पूर्ण वर्ग बनाने की विधि द्वारा ज्ञात कीजिए: (ii) 8x2-14x - 15 = 0 (iii) 2x +x+4 = 0 (iv) 3x2-5x + 2 = 0 --
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If the roots of the following quadratic equations exist, find them by the method of making them perfect squares: (ii) 8x2-14x - 15 = 0 (iii) 2x +x+4 = 0 (iv) 3x2-5x + 2 = 0
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