Evaluate
2\left(x-6\right)\left(x-2\right)
Expand
2x^{2}-16x+24
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2\left(x^{2}-8x+16\right)-8
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-4\right)^{2}.
2x^{2}-16x+32-8
Use the distributive property to multiply 2 by x^{2}-8x+16.
2x^{2}-16x+24
Subtract 8 from 32 to get 24.
2\left(x^{2}-8x+16\right)-8
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-4\right)^{2}.
2x^{2}-16x+32-8
Use the distributive property to multiply 2 by x^{2}-8x+16.
2x^{2}-16x+24
Subtract 8 from 32 to get 24.
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