Question

Form a quadratic equation with roots $4$ and $5$

Answer 1

Sum of the roots$=4+5=9$

Product of the roots$=4\times 5=20$

The quadratic equation is $x^2-\left(sumoftheroots\right)x+productoftheroots=0$

$\therefore$ the quadratic equation is $x^2-9x+20=0$