You must know that : (a-b) ^2 = a^2 - 2ab + b^2 so let a=x and b=2, applying above formula you'll get f(x) = x^2 - 4x +4 + 4 =x^2 - 4x +8 Hope you got it ;-) Revert back if you still face any trouble.
Answer:
1) the answer is d
2) the answer is a
3) the answer is c
4) the answer is a
hope this helps!
Step-by-step explanation:
Answer:k=42
Step-by-step explanation:
(5k−3)(9+k)
=(5k+−3)(9+k)
=(5k)(9)+(5k)(k)+(−3)(9)+(−3)(k)
=45k+5k2−27−3k
=5z2+42z−27
=42k
The answer is $820.
I found this by 0.8x = 656
(Remember, a 20% discount means that it costs 80%, or 0.8, of the original price)
Then, divide 0.8 on both sides:
0.8x/0.8 = 656/0.8
This leaves you with:
x = 820