Answer:
9x²-30x+25
Explanation:
Make sure you don't just square the separate terms (I used to struggle to remember that lol)
Expand the problem:
(3x-5)(3x-5)
The method is called FOIL (First, Outside, Inside, Last)
I just think about it like distributing the 1st term to the second parentheses, and then repeating with the 2nd term.
Expanded, the result would be:
(3x · 3x) + (3x · (-5)) + (-5·3x) + (-5·(-5))
Since this is fairly simple, you can do most of it in your head! I would write it out as:
9x²-15x-15x + 25, then simplify to :
9x²-30x+25
You got this!