Range of Quadratic polynomial

If the range of a quadratic polynomial P(x) with leading cofficient one is [(13+36k+9k^(2))/(4),oo)AA x in R then interval of k for which P(x)=0 has

The sum of zeroes of quadratic polynomial is -sqrt2 and product is 7, that quadratic polynomial is :

Graphs of quadratic polynomial and their application, Problems related to sign of quadratic polynomial

The sum and product of the zeroes of a quadratic polynomial are 2 and - 15 respectively. The quadratic polynomial is

Graph of quadratic polynomial when polynomial have no zeroes

Sign of a Quadratic Polynomial

Problems on Sign of a Quadratic Polynomial

Graph of Quadratic Polynomial

Sign of a quadratic polynomial

Introduction to Sign of a Quadratic Polynomial