Question

If sides of a triangle ABC satisfy a relation 4a2 + 9b2 + c2 = 2a(a + 3b + c), then -
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Answer 1

Step-by-step explanation:

Given  a+b−c=2 and 2ab−c2=4

Using these two 2ab−4=c2=(a+b−2)2

⇒2ab−4=a2+b2+2ab−4a−4b+4⇒a2+b2−4a−4b+8=0

⇒(a−2)2+(b−2)2=0⇒a=b=2⇒c=2

Thus triangle is equilateral. Hence Δ2=(43.(2)2)2=3

Answer 2

Answer:

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