Please help asap 18 pts + brainliest for right/best answer

Find the Greatest Common Factor (GCF)
GCF = 7x
Factor out the GCF (Write the GCF first. Then, in parentheses, divide each term by the GCF.)
7x(7x^2/7x + -49x/7x)
Simplify each term in parentheses
-7x(x - 7)
-7x² + 49x
First let's remove x.
x.(-7x + 49)
We know that 7 and 49 are multiples, so we can take this out too.
7x.(-x + 7)
Rearranging terms:
7x.(7 - x)