\(x^2-19x+90\) को गुणनखंडित करें।
Factorise \(x^2-19x+90\).
Explanation opens after your attempt
B. ((x-9)(x-10))सही गुणनखंड
Concept
Here (-9+(-10)=-19) and ((-9)(-10)=90). In exams use two negative signs when the constant is positive and the middle term is negative.
Why this answer is correct
The correct answer is B. ((x-9)(x-10)) / सही गुणनखंड. Here (-9+(-10)=-19) and ((-9)(-10)=90). In exams use two negative signs when the constant is positive and the middle term is negative.
Exam Tip
(-9+(-10)=-19) और ((-9)(-10)=90) है। परीक्षा में धनात्मक स्थिर पद और ऋणात्मक मध्य पद पर दोनों चिन्ह ऋणात्मक रखें।
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