Choose the correct product of (2x − 5)2.
does the power change the sign ? like would it be
4x^2-10
or
4x^2+25

Question

Choose the correct product of (2x − 5)2. 
does the power change the sign ? like would it be 
4x^2-10
or 
4x^2+25

foolaroundmath · Answer

Neither. Try multiplying term by term for this 
(2x-5)(2x-5)
= 2x(2x-5) -5(2x-5)

anonymous · Answer

4x^2-20x+25 then?

anonymous · Answer

Here you have to use the formula:

$$\huge \color{green}{(a-b)^2 = a^2 + b^2 - 2ab}$$

anonymous · Answer

Yes, This one is right...

foolaroundmath · Answer

Yes, the answer is right. I was trying to point towards the identity that waterineyes posted. It's something that should be remembered. (its easy enough to derive using the same procedure of multiplying term by term)

$(a-b)^{2} = (a-b)(a-b)$