Question

C-4.a 3 + 51 If one root of the equation 2x2 - 6x + c = 0 is – Por, then the value of c will be - (1) 7 (2) -7 (3) 17 (4) -17 C-5. The quadratic aquation will

JEE/Engineering Exams

Maths

Solution

162

4.0 (1 ratings)

Since root exit in pairs [ begin{array}{l}text { another root is } beta=frac{3-5 l^{circ}}{2} text { now, } alpha beta=frac{c}{a}=frac{c}{2}=frac{3+s i}{2} times frac{(3-5 i)}{2} text { or } C=frac{3^{2}-(5 i)^{2}}{2}=frac{9+25}{2}=frac{34}{2}=17end{array} ]