AP EAMCET · Maths · Determinants
Let . If the roots of the equation are , then
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
Given: A=-2x1x1123-1 Also, detA=0 ⇒-2x1x1123-1=0 ⇒-2-1-3-x-x-2+3x-2=0 ⇒x2+5x+6=0 ⇒x+2x+3=0 ⇒x=-2, -3 So, l3-m3=-23--33=-8+27=19
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