F ( x ) = ( 3 x + 6 ) ( 3 x - 6 ) / ( 3 x + 6 ) = 3 x - 6 and for domain : 3 x + 6 ≠ 0 3 x ≠ - 6 x ≠ - 2 anwser graph of 3 x - 6, with discontinuity at - 2
If we look at ΔBDH, we notice that m∠BHG has to be 108 - 36 - 39 = 105°. Because x and ∠BHG are a linear pair we know that x = 180 - ∠BHG = 180 - 105 = 75°.
