Class 10th Quadratic equations case study Shown below is the graph of a quadratic equation y

Shown below is the graph of a quadratic equation y = (x2 + kx + 12).
a) Without finding the value of k, find the two roots of the given quadratic equation.
b) Find k
c) Find d
d) Without finding actual roots what are Signs of roots of quadratic equation x2 + 99x + 127 =0