कौन-सा क्षेत्रफल मॉडल \(x^2-2x-15\) को गुणनखंडित करने में मदद करेगा?
Which area model helps factorize \(x^2-2x-15\)?
Explanation opens after your attempt
A. भुजाएं (x+3) और (x-5)correct signed sides
Concept
Since (3+(-5)=-2) and (3\cdot(-5)=-15), the sides are (x+3) and (x-5). In exams check sum and product with signs.
Why this answer is correct
The correct answer is A. भुजाएं (x+3) और (x-5) / correct signed sides. Since (3+(-5)=-2) and (3\cdot(-5)=-15), the sides are (x+3) and (x-5). In exams check sum and product with signs.
Exam Tip
(3+(-5)=-2) और (3\cdot(-5)=-15) इसलिए भुजाएं (x+3) और (x-5) हैं। परीक्षा में चिन्ह सहित योग और गुणनफल जांचें।
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