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Which condition is necessary for the expression \(ax^2+bx+c\) to be called a quadratic expression?व्यंजक \(ax^2+bx+c\) को द्विघात व्यंजक कहलाने के लिए कौन-सी शर्त आवश्यक है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: \(a\ne 0\)\(a\ne 0\)
A quadratic expression must retain an \(x^2\) term, so its coefficient must satisfy \(a\ne0\). The coefficients \(b\) and \(c\) may be zero. Exam tip: check the coefficient of the highest power first.द्विघात व्यंजक में \(x^2\) का गुणांक शून्य नहीं होना चाहिए, इसलिए \(a\ne0\) आवश्यक है। \(b\) या \(c\) शून्य हो सकते हैं। परीक्षा टिप: सबसे बड़ी घात का गुणांक जाँचें।
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