Answer:

Explanation:
Hello.
All we have to do in order to simplify this expression is
- multiply 7 times -7 and 6x
- So let's do it! :D
Multiply:
7 times -7 = -49
7 times -6x = 42x
So we have
-49-42x
And we're done!
I hope it helps & have an outstanding day!
~ST2710 :)