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Which option has a polynomial of degree (2) but coefficient of (x) is (0)?किस विकल्प में डिग्री (2) वाला बहुपद है लेकिन (x) का गुणांक (0) है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: \(5x^2-9\)\(5x^2-9\)
In \(5x^2-9\), the highest power of \(x\) is \(2\), so its degree is \(2\). There is no \(x\)-term, which can be written as \(0x\); therefore, the coefficient of \(x\) is \(0\). In \(5x^2+x-9\), the coefficient of \(x\) is \(1\), so it is not correct. Exam tip: the coefficient of an absent term is always \(0\).\(5x^2-9\) में उच्चतम घात \(2\) है, इसलिए इसकी डिग्री \(2\) है। इसमें \(x\) वाला पद नहीं है, जिसे \(0x\) माना जाता है; अतः \(x\) का गुणांक \(0\) है। \(5x^2+x-9\) में \(x\) का गुणांक \(1\) है, इसलिए वह सही विकल्प नहीं है। परीक्षा टिप: अनुपस्थित पद का गुणांक हमेशा \(0\) होता है।
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