Answer: 1
Explanation:
you need to use the formula (a-b)^2 (squared)
when you open the parenthesis, the formula should like this
a^2 -2ab + b^2
the main term that'll help you here is the -2ab
we know that a is x because in the equation you wrote, it begins with x^2
so the following info we have is -2*x*?
so -2x*1 will equal -2x
now looking at the a-b squared formula, we focus on the last term which is b squared. so if b is 1, 1*1 = 1
hope this helped!