(X-10)(X-10)
You need to first multiply out the brackets. So, first times X by X, which makes x^2 . Then do -10 x -10 which makes 100. You then need to multiply the X within the first bracket with the minus 10 in the second bracket which makes -10x. Do the same but with the -10 from the first bracket and the X from the second which again makes -10x. So altogether you have x^2-10x-10x+100. This can be simplified down to x^2-20x+100. You then do the same thing for the second question :)
Answer:
10-(5+f)
Step-by-step explanation:
Should be right
Answer:
2 Blocks
Step-by-step explanation:
Answer:
the answer is 4
Step-by-step explanation:
let x= length of the first piece.
second piece is 2x, right
third piece x+5, right
Total, in x-talk, is x + 2x + x+5 and that equals 21 feet, right.
Combine like terms: 4x + 5 = 21. Still with me?
So 4x = 16 (do you see why?)
So, what x must x be is 4
