Step-by-step explanation:
hope this will help you......
Answer:

Step-by-step explanation:
Do FOIL, first outside inside last
3x × 3x = 9x^2
3x × -7 = -21x
7 × 3x = 21x
7 × -7 = -49

So it would just be 9x^2 - 49
Answer:
-3,5
Step-by-step explanation:







Or


Answer:
C. x<27 and x>-3
Step-by-step explanation:
[x-12]<15
-15<x-12<15
-15+12<×<15+12
-3<×<27
x>-3 and x<27