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x^2 - 9x + 20 = 0 இன் மூலங்களின் கூடுதல்

A4
B9
C5
D20
Answer & Solution
Correct answer: B. 9
இச்சமன்பாடு (x - 4)(x - 5) எனக் காரணிப்படுத்தப்படுகிறது, எனவே மூலங்கள் 4 மற்றும் 5 ஆகும், இவற்றின் கூடுதல் 9.
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