Expand
50x^{2}-160x+129
Evaluate
2\left(5x-8\right)^{2}+1
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2\left(25x^{2}-80x+64\right)+1
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(5x-8\right)^{2}.
50x^{2}-160x+128+1
Use the distributive property to multiply 2 by 25x^{2}-80x+64.
50x^{2}-160x+129
Add 128 and 1 to get 129.
2\left(25x^{2}-80x+64\right)+1
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(5x-8\right)^{2}.
50x^{2}-160x+128+1
Use the distributive property to multiply 2 by 25x^{2}-80x+64.
50x^{2}-160x+129
Add 128 and 1 to get 129.
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