Evaluate
4\left(x^{2}-8x+25\right)
Expand
4x^{2}-32x+100
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64-32x+4x^{2}+36
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(8-2x\right)^{2}.
100-32x+4x^{2}
Add 64 and 36 to get 100.
64-32x+4x^{2}+36
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(8-2x\right)^{2}.
100-32x+4x^{2}
Add 64 and 36 to get 100.
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