Evaluate
4\left(x-4\right)\left(x-2\right)
Expand
4x^{2}-24x+32
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4x^{2}-24x+36-4
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(2x-6\right)^{2}.
4x^{2}-24x+32
Subtract 4 from 36 to get 32.
4x^{2}-24x+36-4
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(2x-6\right)^{2}.
4x^{2}-24x+32
Subtract 4 from 36 to get 32.
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