\(x^2-18x+80=0\) में कौनसी संख्या जोड़ी मध्य पद बनाने में मदद करेगी?
Which number pair helps in making the middle term in \(x^2-18x+80=0\)?
Explanation opens after your attempt
A. (-8) और (-10)(-8) and (-10)
Concept
(-8+(-10)=-18) and ((-8)(-10)=80), so this pair is correct. In exams, when (c) is positive and (b) is negative, both numbers are negative.
Why this answer is correct
The correct answer is A. (-8) और (-10) / (-8) and (-10). (-8+(-10)=-18) and ((-8)(-10)=80), so this pair is correct. In exams, when (c) is positive and (b) is negative, both numbers are negative.
Exam Tip
(-8+(-10)=-18) और ((-8)(-10)=80), इसलिए यह जोड़ी सही है। परीक्षा में (c) धनात्मक और (b) ऋणात्मक हो तो दोनों संख्याएं ऋणात्मक होती हैं।
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