It's B, remember when you have _ ( referring to =) you have straight line, but when it's just < or > you have dotted line
X^2 - 9x + 18
factors of 18: 1*18, 2*9, 3*6,
the sums of the factors: 19, 11, 9
the positive 18 tells us both factors have the same sign, the negative 9 tells us they are both negative
(x - 3)(x - 6)
Answer:
the same way Pythagoras Theorem
and sorry for the hand writing