Can someone with this question ? ?
fully factorise x^2+ 9x +18

This is of the form ax^2+bx+c, you must find two values, j and k, that satisfy two conditions:

jk=ac=18 and j+k=b=9, so j and k must be 3 and 6, and the factors then must be:

(x+3)(x+6)

Angle onp = 43°angle lno = 137°angle mnp = 137°