Step-by-step explanation:
This quadratic does not have rational roots:
x2+9x+2
=(x+(sqrt(73)+9)/2) (x-(sqrt(73)-9)/2)
Unless there is a typo.
Just a guess, if the question had been x^2+9x+20, then
x^2+9x+20
x^2+5x + 4x+20
=x(x+5) + 4(x+5)
=(x+4)(x+5)
