allery$x^2 - 9x + 20 = 0$ के मूलों का योग क्या है?
A4
B9
C5
D20
Answer & Solution
Correct answer: B. 9
समीकरण का गुणनखंड $(x - 4)(x - 5) = 0$ होता है, इसलिए इसके मूल 4 और 5 हैं, जिनका योग 9 है।
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