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-\left(x^{2}-4x+4\right)+3
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-2\right)^{2}.
-x^{2}+4x-4+3
To find the opposite of x^{2}-4x+4, find the opposite of each term.
-x^{2}+4x-1
Add -4 and 3 to get -1.
-\left(x^{2}-4x+4\right)+3
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-2\right)^{2}.
-x^{2}+4x-4+3
To find the opposite of x^{2}-4x+4, find the opposite of each term.
-x^{2}+4x-1
Add -4 and 3 to get -1.