Expand
-x^{2}+2xz-z^{2}
Evaluate
-\left(x-z\right)^{2}
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-\left(x^{2}-2xz+z^{2}\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-z\right)^{2}.
-x^{2}+2xz-z^{2}
To find the opposite of x^{2}-2xz+z^{2}, find the opposite of each term.
-\left(x^{2}-2xz+z^{2}\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-z\right)^{2}.
-x^{2}+2xz-z^{2}
To find the opposite of x^{2}-2xz+z^{2}, find the opposite of each term.
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