Answer:
x² -24x +144
Step-by-step explanation:
You want the expanded form of (x -12)².
You can find the expanded form of the given square using the distributive property:
(x -12)² = (x -12)(x -12) = x(x -12) -12(x -12)
= x² -12x -12x +144
= x² -24x +144
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Additional comment
The square of a binomial is ...
(a +b)² = a² +2ab +b²
For a=x and b=-12, this is ...
(x -12)² = x² +2(x)(-12) +(-12)² = x² -24x +144
If you remember the general form of the square of a binomial, you can write down the answer.