(x-2-(a+4)x+4a=0) के लिए कौन-सा कथन हमेशा सत्य है?
Which statement is always true for (x-2-(a+4)x+4a=0)?
Explanation opens after your attempt
A. (4) हमेशा एक जड़ है(4) is always a root
Concept
Putting (x=4) gives (16-4(a+4)+4a=0). Hence (4) is always one root and the other root is (a).
Why this answer is correct
The correct answer is A. (4) हमेशा एक जड़ है / (4) is always a root. Putting (x=4) gives (16-4(a+4)+4a=0). Hence (4) is always one root and the other root is (a).
Exam Tip
(x=4) रखने पर (16-4(a+4)+4a=0) मिलता है। अतः (4) हमेशा एक जड़ है और दूसरी जड़ (a) होती है।
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