1.

If a and b are the roots of the equation x2 + 7x + 4 = 0 where a > b, then find the value of 2/7a + 1/3.5b + ab.

Answer»

x2 + 7x + 4 = 0

Given that a & b are roots of this equation.

∴ a + b = -7

ab = 4

Now,

\(=\frac27a + \frac1{3.5}b + ab\)

\(=\frac{1}{3.5}(a+b)+ ab\)

\(= \frac1{3.5}\times -7 +4\)

\(= - 2 + 4\)

\(= 2.\)



Discussion

No Comment Found

Related InterviewSolutions