Question

Only third question is compulsory balance I finished

Answer 1

We have a formula to find root of a quadratic equation:

if quadratic equation is of the form: ax2 - bx + c then roots are given by:

first root = (1/(2*a))*(-b + squareroot[(b*b - 4*a*c)])

second root = (1/(2*a))*(-b - squareroot[(b*b - 4*a*c)])