Evaluate
2\left(7-x\right)^{2}+1
Expand
2x^{2}-28x+99
Graph
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2\left(49-14x+x^{2}\right)+1
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(7-x\right)^{2}.
98-28x+2x^{2}+1
Use the distributive property to multiply 2 by 49-14x+x^{2}.
99-28x+2x^{2}
Add 98 and 1 to get 99.
2\left(49-14x+x^{2}\right)+1
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(7-x\right)^{2}.
98-28x+2x^{2}+1
Use the distributive property to multiply 2 by 49-14x+x^{2}.
99-28x+2x^{2}
Add 98 and 1 to get 99.
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