Question

if A and B are the roots of ax²+bx²+c=0 then the value of a²+b²+2ab is​

Answer 1

Correct Question :-

If a and b are the roots of ax²+bx²+c=0 then the value of a²+b²+2ab is .

Note :- The incorrect part is in bold .

Solution :-

Given ,

• a , b are the roots of ax² + bx + c = 0
• Value of a² + b² + 2ab = ?

As we know that , a² + b² + 2ab = ( a + b )²

☞ ( a + b )²

Since a , b are the roots of the given equation . Sum of roots = - (coefficient of x)/ coefficient of x² = - b/a

☞ ( - b/a )²

☞ ( - b)²/a²

Square of a negative number will be the same number with positive sign .

☞ b²/a²

Hence , a² + b² + 2ab = b²/a²

Answer 2

Answer:

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