Answer:

Step-by-step explanation:
distribute:
)(−3)(3+6)
)(3+6)−3(3+6)
+6)(3+6)−3(3+6)
+6x−3(3x+6)32+6−3(3+6)
3x2+6x−3(3x+6)32+6−3(3+6)
3x2+6x−3(3x+6)32+6−3(3+6)
3x2+6x−9x−1832+6−9−18
combine like terms:
x2+6x−9x−1832+6−9−18
3x2−3x−1832−3−18
solution:
3{x^{2} } -3x-18