Evaluate
\left(3-x\right)^{2}+6
Expand
x^{2}-6x+15
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6+9-6x+x^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(3-x\right)^{2}.
15-6x+x^{2}
Add 6 and 9 to get 15.
6+9-6x+x^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(3-x\right)^{2}.
15-6x+x^{2}
Add 6 and 9 to get 15.
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