Answer: A.) 25x² - 20x + 4
Explanation:
(5x – 2)² is basically saying (5x-2)(5x-2), so use the FOIL method to multiply the binomials:
First(F): 5x(5x) = 25x²
Outer(O): 5x(-2)= -10x
Inside(I): -2(5x)= -10x
Last(L): -2(-2)=4
Now, just combine like terms:
25x²-10x-10x+4
25x²-20x+4
So your answer would be A.